Editing Stage hazard

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[[File:SSBUWebsiteSonic4.jpg|thumb|upright=1.4|{{SSBU|Sonic}} nearly colliding with a [[Shy Guy]] on [[Figure-8 Circuit]], an example of a stage hazard]]

A '''stage hazard''' is any aspect of a [[stage]] (that is, a [[stage element]]) which could pose a threat to players. Most stage hazards deal [[damage]] and [[knockback]], while the remainder includes a wide range of effects, such as sudden movements of the stage or a panning camera that can carry less agile [[character]]s into the [[blast line]]. A stage hazard should not be mistaken for any element which might aid or save the opponent, such as the Support Ghost in {{SSBB|Yoshi's Island}}, although the same element may play several roles.

How predictable a stage hazard is and how much influence it has over the match are factors usually considered when deciding stage [[tournament legal|legality]]. Stages with many or overwhelming hazards are typically banned in [[tournament]]s, as they tend to interfere with the outcomes of matches or because the competitors only value aspects of a match that they have to control without overcentralizing the match.

Some stage hazards may be extremely minute or subtle or only apply to certain characters. For example, the balloon in [[Smashville]] may unexpectedly collide with [[Ness]]'s [[PK Thunder]], making him temporarily vulnerable or leaving him in the [[helpless]] state if he is in the air.

Stage hazards often play a role in improvised [[combos]].

In ''[[Super Smash Bros. for Wii U]]'', certain stage hazards, such as all of the magma-based obstacles in [[Norfair]], are disabled in [[8-Player Smash]]. In ''[[Super Smash Bros. Ultimate]]'', stage hazards can be toggled on or off regardless of the number of players.

All stage hazards are paused during a [[Final Smash]]; however, their hitboxes [https://www.youtube.com/watch?v=MRJOu-_qAH8 remain active while a non-cutscene Final Smash is in effect], making them exploitable to gain additional damage.

==Types of stage hazards==
*'''Static''' hazards generally stay in place or follow a set path and produce damage and knockback upon collision. Examples of stationary static hazards include spikes and lava; an example of a moving static hazard is the minecart in [[PictoChat]]. Some static hazards have a [[fixed knockback]]. Static hazards that cause damage but not knockback or flinching include [[hoop damage]] and the rain in the Kitty Cover mini-game on [[WarioWare, Inc.]]
*'''Blast''' hazards will appear and fire or explode over a period of time, entrapping players that come near their radius. The damage they inflict depends on how long the character remains trapped within the blast. Some blast hazards will seek a target before executing, such as the Combo Cannon on [[Halberd]], while some will appear randomly, such as [[Banzai Bill]] in [[Peach's Castle]].
*'''Launchers''' will quickly move the character from one part of the stage to another and sometimes into the blast line. The most basic example of a launcher is the catapult on [[Pirate Ship]], which will only fling the victim to the far left of the pirate ship, while the victim suffers neither damage nor [[flinching]]. The [[Barrel Cannon]] in [[Congo Jungle]] is considered a launcher but not usually a hazard, because there is a brief period of time where the player has control over when it will fire.
*'''Rogue platforms''' are [[platform]]s that travel or move suddenly through a blast line. For example, if a character is [[stun]]ned while standing on an [[Arwing]] in [[Sector Z]], the Arwing may leave the scene and carry the character into the blast line. The track on [[Big Blue]], the balancing platforms on [[Mushroom Kingdom]], and any platform aside from the main one on [[Town and City]] may also be considered rogue platforms.
*'''Trapdoors''' are sections of the stage that can give way and reappear over a character, which usually makes returning to the stage difficult or impossible. For example, [[King Bulblin]] on the [[Bridge of Eldin]] can destroy the bridge, and players can be trapped below when the bridge is later reconstructed. Another example of a trapdoor hazard is the [[Drop Block]] in one of the default [[custom stage]]s in ''[[Brawl]]''. Trapdoors differ in terms of how they are triggered; some automatically open and close at timed intervals, some open based on proximity (with a delay before opening) and then automatically close sometime later; and still others have to be manually triggered (such as by taking damage) in order to open.
*'''[[Stage transformation|Transformations]]''' create a situation where the character can be caught under or off to the side of a stage because of a sudden shift in the stage. For example, the [[Frigate Orpheon]] stage can cause players to accidentally self-destruct when it flips upside down, and [[Orbital Gate Assault]] features many sudden transitions from one group of spaceship platforms to another. These should not be confused with trapdoor hazards; the difference is that trapdoors are located in specific portions of a stage, whereas transformation hazards specifically feature a (near) global change in the stage.
*'''Acid''' hazards, which do not specifically need to be the acid, rise or pour in while covering a blast line. Collision with the acid will result in damage and knockback. In high hitstun and low percentage environments, characters will sometimes bounce around in rising acid. The first stage to feature an acid hazard is [[Planet Zebes]]. [[Norfair]] features lava in the place of acid.
*'''Predators''' will pursue the players and attack them. Some examples include the lookout cannons on Pirate Ship and the Arwings and [[Wolfen]] which swoop in and fire lasers around characters on various {{uv|Star Fox}} stages. These sometimes overlap with blast hazards, such as the Combo Cannon on Halberd.
*'''Vehicles''' may occasionally speed through some stages, causing damage and knockback to characters that collide with them. A warning or environment cue that a vehicle is approaching is usually given, such as a flashing exclamation point on [[Onett]], or the vehicle can be seen from far away before arrival, such as the racers on {{SSBB|Mario Circuit}}. Vehicle collisions may also trigger explosions on certain items. Vehicles are similar to mobile static hazards in that both pose a threat by slamming into fighters; the main difference is that vehicles briefly pass through the playable area at various intervals, while static hazards are either always onstage or remain onstage for extended periods of time, and vehicles also usually move quickly and warn players before their appearance, while static hazards can appear abruptly and usually move slowly (if they move at all). Vehicle hazards are not necessarily actual vehicles; anything that periodically rushes through the stage and damages fighters in its path, without lingering onstage for more than a few seconds, fits this hazard archetype. A good example is the Peckish Aristocrab in the [[Garden of Hope]] stage, which does not fit any conventional definition of the word "vehicle", yet has all the properties of a vehicle-type stage hazard (dashes through stage periodically and inflicts damage and knockback to all fighters it collides with, has a clear warning of its imminent arrival before threatening fighters, does not remain on stage for a prolonged period of time).
*'''Weather''' hazards affect physics. These hazards typically follow a change in scenery or a stage transformation; for example, the Flying transformation in [[Pokémon Stadium 2]] introduces a weather hazard that blows gusts of wind upwards. Characters caught in the gusts have a dramatically reduced [[falling speed]] and are easier to [[Star KO]] and approach. Other weather hazards may affect the progression of time, such as [[Dialga]] in [[Spear Pillar]].
*'''[[Slippery]] platforms''' make it difficult to control the momentum of traversing characters. In ''Brawl'', slippery platforms may also increase the odds that a character will [[trip]]. This hazard does not affect the [[Ice Climbers]].
*'''Switches''' need to be activated before any changes occur. Currently, the only switch that significantly threatens players is the [[POW Block]] in {{SSB|Mushroom Kingdom}}.
*'''Panning cameras''' force characters to follow the camera, as [[blast line]]s will move with the camera. [[Icicle Mountain]] features a camera that pans up the stage at varying speeds, which can catch characters with the lower blast line if they have a poor jumping ability.
*'''Obstacles''' generally obstruct character movement or present a challenging gap to cross. While not dangerous by themselves, obstacles are often used in conjunction with panning cameras.
*'''Illusions''' are designed to affect the players themselves rather than the character, although they can sometimes lead to disorientation and self-destruction. [[Palkia]] on Spear Pillar can tilt the screen's orientation of the stage and invert player controls by mirroring the stage.
*'''Enemies''' generally appear as a species and can obstruct the player or cause knockback and damage. Enemies are similar to static hazards, but most enemies can be damaged and defeated or can be grabbed and thrown. One example of an enemy hazard is the [[Polar Bear]] in Icicle Mountain.
*Stage bosses are large enemies introduced in ''[[Super Smash Bros. 4]]''. They are much larger than regular enemies and can take a lot of damage before being defeated. They may also have other significant effects besides disrupting the battle, such as destroying portions of the stage or awarding a KO to the player who defeated them.
*'''Monsters''' are large enemy species that cannot be defeated and can KO a player when hit, grabbed or swallowed by. Some monsters include the [[Ultimate Chimera]] on [[New Pork City]] and the [[fish]] on [[Summit]]. While the [[Peckish Aristocrab]] on [[Garden of Hope]] exhibits characteristics of a vehicle hazard, as previously mentioned, it is also considered a monster by virtue of being a large, hostile living being that is immune to all attacks from the fighters.

==Stage hazard switch==
In ''[[Super Smash Bros. Ultimate]]'', stage hazards can be turned on or off. Its description in-game says that it turns off hazards "like environmental changes and enemies"; however, the way it is implemented from stage to stage can vary—for example, some stages (such as [[Saffron City]]) have moving platforms kept still, while others (such as the rightmost platform in [[Frigate Orpheon]]) may still move. The list of stages that have changes follows:

{| class="wikitable"
|-
! Stage
! Differences with hazards off
|-
| [[3D Land]]
| The ? Blocks are already empty, and brick blocks cannot be broken. Donut Blocks don't fall. Flipping platforms are already laid out. The rocks don't appear in the second phase. The skewers don't appear in the final phase.
|-
| [[75m]]
| The fire enemies do not appear. Donkey Kong does not move forward, or release the springs on the stage. The elevators are stationary.
|-
| [[Arena Ferox]]
| The stage does not transform and is locked to a random variation. The statues of the first variation cannot be destroyed. The hanging platforms of the fourth variation never move when hit.
|-
| [[Balloon Fight]]
| Fish, flippers and lightning bolts do not appear. The rocks under certain platforms cannot be broken.
|-
| [[Battlefield (SSBU)|Battlefield]] (including Battlefield forms)
| No changes.
|-
| [[Big Battlefield (SSBU)|Small]] and [[Big Battlefield (SSBU)|Big Battlefield]]
| No changes.
|-
| [[Big Blue]]
| The other F-Zero racers do not spawn, leaving the [[Falcon Flyer]] as the only platform. The Falcon Flyer does not fly offscreen and despawn.
|-
| [[Boxing Ring]]
| The stage lights do not fall, and cannot be attacked, although they will still shake when landing on them.
|-
| [[Bridge of Eldin]]
| King Bulblin does not appear, and the bridge is never blown up.
|-
| [[Brinstar]]
| The acid does not rise, and the fleshy parts of the stage cannot be destroyed.
|-
| [[Brinstar Depths]]
| Kraid does not appear, and the stage does not rotate.
|-
| [[Castle Siege]]
| The stage does not transform and is set to the castle's roof.
|-
| [[Cloud Sea of Alrest]]
| Azurda will keep his head static throughout the match, keeping it elevated slightly above the clouds.
|-
| [[Coliseum]]
| No platforms rise from the ground.
|-
| [[Corneria]]
| Arwings do not appear, and the Great Fox's cannon does not fire lasers and cannot be attacked.
|-
| [[Delfino Plaza]]
| No changes.
|-
| [[Distant Planet]]
| The leaves and vine do not sink when stood on. It does not rain on the stage, thus the river of water never appears. The [[Red Bulborb]] does not appear. Pellets and Onions don't spawn.
|-
| [[Dracula's Castle]]
| Candles do not appear. The moving platforms do not move.
|-
| [[Dream Land (SSB)|Dream Land]]
| Whispy Woods does not blow wind.
|-
| [[Dream Land GB]]
| No changes.
|-
| [[Duck Hunt (stage)|Duck Hunt]]
| The dog and ducks do not appear. The bush never appears.
|-
| [[Flat Zone X]]
| The stage does not transition past the first form, the randomly moving Manhole platforms, the treasure diver and the firemen do not appear.
|-
| [[Figure-8 Circuit]]
| No karts are on the track, and the race map is not displayed on the jumbotron, and instead the animated background covers its entirety.
|-
| [[Final Destination (SSBU)|Final Destination]] (including Omega forms)
| No changes.
|-
| [[Find Mii]]
| Dark Emperor does not appear. The cage stays stationary at all times. The platforms never collapse.
|-
| [[Fountain of Dreams]]
| The left and right platforms do not move.
|-
| [[Fourside]]
| The UFO does not appear, and the platform and crane do not move.
|-
| [[Frigate Orpheon]]
| The stage does not flip, remaining only in the first area. Blackouts do not occur, and the platforms that move in from the left and right blast zones are gone. The platform on the right still moves up and down.
|-
| [[Gamer]]
| [[5-Volt]] does not appear and the fake-outs do not occur. If present, 9-Volt's gamepad will remain off and the sketchbook will only show Mona.
|-
| [[Garden of Hope]]
| The bridge, pots, sticks, Pikmin, [[Bulborb]], and [[Peckish Aristocrab]] do not appear. The lifts do not fall.
|-
| [[Garreg Mach Monastery]]
| Battle begins only in Cathedral. Notably, the moving platforms can still carry fighters offscreen.
|-
| [[Gaur Plain]]
| The springs do not appear and Metal Face never appears.
|-
|[[Gerudo Valley]]
| The bridge cannot be damaged or destroyed. [[Koume and Kotake]] do not appear.
|-
| [[Golden Plains]]
| Coins do not appear, and the stage does not scroll. The moving platforms don't move.
|-
| [[Great Bay]]
| Tingle does not appear. The turtle never moves, though it still bobs in the water.
|-
| [[Great Plateau Tower]]
| The top of the tower does not take damage and cannot be destroyed.
|-
| [[Green Greens]]
| Whispy Woods does not blow wind or drop apples, and there are no falling blocks or bombs.
|-
| [[Green Hill Zone]]
| Checkpoints do not appear, and the stage no longer crumbles.
|-
| [[Halberd]]
| None of the weapons on the Halberd ever attack.
|-
| [[Hanenbow]]
| The leaves do not tilt and change color when attacked, and the Hanenbow creatures do not appear.
|-
| [[Hollow Bastion]]
| The stage does not transition to Dive to the Heart.
|-
| [[Hyrule Castle]]
| There are no tornadoes.
|-
| [[Jungle Japes]]
| Klaptraps do not appear.
|-
| [[Kalos Pokémon League]]
| The stage does not transform.
|-
| [[King of Fighters Stadium]]
| No changes.
|-
| [[Kongo Falls]]
| Klaptrap, the launch barrel, and the log platforms and crates that flow in the waterfall do not appear. The main raft platform is no longer moved when fighters stand on it.
|- 
| [[Kongo Jungle (SSB)|Kongo Jungle]]
| There is no [[Barrel Cannon]], and the rotating platforms do not move.
|-
| [[Living Room]]
| Blocks and other miscellaneous items only spawn once and never disappear. They still damage players when they land, however.
|-
| [[Luigi's Mansion]]
| The support pillars cannot be broken. The moving platforms don't appear.
|-
| [[Lylat Cruise]]
| The stage does not tilt and only uses the Starry Space background without the space warp. As such, [[Smash Taunt]]s cannot be activated.
|-
| [[Magicant]]
| The Flying Men, trees, Mobile Sprouts, Sky Runners, tomatoes, octopus statues, and Dungeon Man do not appear.
|-
| [[Mario Bros.]]
|The [[Shellcreeper]]s, [[Sidestepper]]s, and [[POW Block]] do not appear. The blue platforms do not bump up slightly when hit from below.
|-
| [[Mario Circuit (SSB4)|Mario Circuit]]
| No karts are on the track.
|-
| [[Mario Galaxy]]
| No changes.
|-
| [[Mementos]]
| The top right platform, ceiling, walls, and trains do not appear.
|-
| [[Midgar]]
| Summon Materia never appear.
|-
| [[Minecraft World]]
| Destructible blocks do not appear.
|-
| [[Mishima Dojo]]
| No changes.
|-
| [[Moray Towers]]
| No changes.
|-
| [[Mute City SNES]]
| The Blue Falcon is always the only vehicle onscreen. The moving platforms never move, and the Blue Falcon never goes over the ramp or into the pits. The track still damages players, however.
|-
| [[Mushroom Kingdom (SSB)|Mushroom Kingdom]]
| The balancing platforms in the middle are not there, and Piranha Plants do not spawn. It is impossible to use the Warp Pipes. POW Blocks don't appear.
|-
| [[Mushroom Kingdom II]]
| [[Birdo]] and the Pidgits do not appear.
|-
| [[Mushroom Kingdom U]]
| [[Kamek]] never appears, so the stage never transitions past the first form. Nabbit, the beanstalk, the icicles, the geysers, the Big Urchins, the Stretch blocks, and other hazards do not appear.
|-
| [[Mushroomy Kingdom]]
| The ? Blocks are already empty. The Brick Blocks cannot be attacked or broken.
|-
| [[New Donk City Hall]]
| The moving platforms on some stops do not move. Pauline and the musicians never appear.
|-
| [[New Pork City]]
| The [[Ultimate Chimera]] does not appear, the ship pendulum does not swing, and the platform at the bottom cannot be destroyed. The limousine does not appear.
|-
| [[Norfair]]
| None of the lava obstacles appear.
|-
| [[Northern Cave]]
| No changes.
|-
| [[Onett]]
| The cars do not appear. The Drug Store sign and the awnings below it will not fall. 
|-
| [[Pac-Land]]
| The fire hydrants don't shoot out water, and pushing them does not award the player with the giant status. The water geysers don't appear, the logs don't fall or rotate, the cloud platforms never move, and the springboard doesn't work. The Wing Shoes cannot be collected, and the balloons and Special Pac don't spawn.
|-
| [[Paper Mario]]
| The stage never transitions past the first form. The fan never appears.
|-
| [[Palutena's Temple]]
| The spikes do not appear. The bridge cannot be destroyed, but can still be attacked. The moving platforms do not move. The top left mini-stage does not move, nor does the rising platform on the right. The springs do not appear. The spikes on the bottom of the stage no longer have a hitbox. Oddly, The disappearing ledge to the left of the stage still behaves normally.
|-
| [[Peach's Castle]]
| There is no [[Bumper]], and the bottom platform and triangles do not move.
|-
| [[Pictochat 2]]
| Drawings do not appear.
|-
| [[Pilotwings]]
| The stage does not change from the red biplane, and it does not tilt. The terrain doesn't damage players.
|-
| [[Pirate Ship]]
| The ship's catapult is never used. Enemy lookouts that fire bombs, the [[King of Red Lions]], the storm cyclone, and the small rocky island do not appear. The hull of the ship still KOs players, however.
|-
| [[Pokémon Stadium]]
| The stage does not transform.
|-
| [[Pokémon Stadium 2]]
| The stage does not transform.
|-
| [[Port Town Aero Dive]]
| No cars appear on the track.
|-
| [[Princess Peach's Castle]]
| Banzai Bills and switches never appear. Blocks never spawn. The platforms that would normally rise when stood on are now stationary.
|-
| [[Prism Tower]]
| No changes.
|-
| [[Rainbow Cruise]]
| The stage never transitions past the flying ship.
|-
| [[Reset Bomb Forest]]
| The stage never transitions to the second form.
|-
| [[Saffron City]]
| The door of the Silph Co. building never opens to spawn Pokémon. The hovering platforms on the left do not move.
|-
| [[Shadow Moses Island]]
| The watchtowers cannot be broken.
|-
| [[Skyloft]]
| The main platform doesn't move, and thus does not transition to any other forms.
|-
| [[Skyworld]]
| The solid part of the stages are not destructible. The lower moving platform does not appear. The platform on the right doesn't move, or react to players landing on it.
|-
| [[Smashville]]
| The soft platform does not move once it reaches center stage, which it does much more quickly. Balloons do not spawn.
|-
| [[Spear Pillar]]
| [[Dialga]], [[Palkia]], and [[Cresselia]] do not affect the stage when they appear. The floating platforms never move.
|-
| [[Spiral Mountain]]
| The stage doesn't rotate. However, the floating platforms still appear.
|-
| [[Spirit Train]]
| The final car never changes from its initial basic form, and the blast zones no longer move about as a result. No Dark or Armored Trains spawn. The train still damages players, and moving platforms still appear, however.
|-
| [[Spring Stadium]]
| The trampolines on the stage stay inactive, and the smaller floating ones on either side never appear. ARMS Drones also do not spawn.
|-
| [[Summit]]
| The fish does not appear. The ice platform cannot be destroyed. The icicles don't fall. The left platform never falls from standing on it. The ice block and cloud platforms never appear. The polar bear won't sink the platform further into the water. Notably, the entire stage cycle still occurs.
|-
| [[Super Mario Maker]]
| The stage is still randomized, but moving platforms, brick blocks, rotating blocks, ice blocks, lava, and other disruptive elements are never part of the layout.
|-
| [[Super Happy Tree]]
| The clouds do not disappear.
|-
| [[Suzaku Castle]]
| No changes.
|-
| [[Temple]]
| No changes.
|-
| [[The Great Cave Offensive]]
| The mine carts and treasure chests do not appear. The danger zones, spikes and cannons are still present, however.
|-
| [[Tomodachi Life]]
| The walls covering all the different rooms are always invisible.
|-
| [[Tortimer Island]]
| No fruits appear on the trees. The boat and the shark do not appear.
|-
| [[Town and City]]
| The stage still transitions between the town and city, but the platforms within each form do not move outside of the transition. Balloons do not spawn.
|-
| [[Umbra Clock Tower]]
| The pieces of rubble serving as temporary platforms do not appear, leaving the clock tower itself as the only platform.
|-
| [[Unova Pokémon League]]
| Zekrom and Reshiram do not appear.
|-
| [[Venom]]
| Arwings and Wolfens do not appear. The stage still tilts.
|-
| [[WarioWare, Inc.]]
| Microgames do not occur.
|-
| [[Wii Fit Studio]]
| The platform layout never changes.
|-
| [[Wily Castle]]
| The Yellow Devil and moving platforms do not appear.
|-
| [[Windy Hill Zone]]
| The windmill does not move, and the spring does not appear.
|-
| [[Wrecking Crew]]
| The walls do not break. Bombs and barrels do not appear.
|-
| [[Wuhu Island]]
| The stage remains in its initial floating platform configuration, never stopping to land at any point. The platform moves slowly backwards around the island, rather than moving quickly forwards. It also never gets close enough to the water to deal damage to fighters.
|-
| [[Yggdrasil's Altar]]
| The smaller hard platforms that rise up and appear on the side of the stage do not appear. Treasure chests and [[Mimic|Mimics]] also do not appear.
|-
| [[Yoshi's Island (SSBM)|Yoshi's Island (Melee)]]
| The Rotating Blocks cannot be damaged or broken.
|-
| [[Yoshi's Island (SSBB)|Yoshi's Island]]
| Soft platform does not tilt. Blarggwich and Fly Guys do not appear.
|-
| [[Yoshi's Story]]
| [[Randall]] the cloud and Shy Guys do not appear.
|}

Additionally, several transforming stages stay locked in a certain stop in certain spirit battles.

==See also==
*[[Background character]]

{{Stage hazards}}
[[Category:Stages]]
[[Category:Stage hazards]]
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