Hyrule Castle returned as downloadable content in both versions of Super Smash Bros. 4 on July 31st, 2015, along with Peach's Castle. Like other returning stages from the first Smash Bros. game, some of the textures are slightly higher in quality, but the general overall primitive look of the original is retained. The stage also appears in Super Smash Bros. Ultimate.
In Super Smash Bros., it is the first stage in 1P Game, and Link is the first to be fought.
The stage has a large main platform in the center. Three platforms float about midway across the main platform, with the middle to the right of the top and bottom ones. The bottom platform is just high enough for Captain Falcon's up smash to be able to hit opponents standing on it. The platforms can allow combos such as the Stairway to Heaven to be performed for longer, and situational vertical KOs can also occur on the top platform, KOing at unusually low percentages. Characters such as Mario can also make use of the platforms to land vertical finishers, such as an up smash in Mario's case. Connected to the left of the main platform is a slightly lower, slanted platform. To the right of the main platform is a lower, connected platform with a dark green gazebo-like structure in the middle of it. Characters may stand on top of it, but may not jump through it. This portion of the stage is known in competitive play as the tent (see below for more information).
In competitive play, Fox generally dominates on this stage due to its large size and high amount of space allowing him to use his blaster to projectile camp much easier than on Dream Land. Link is also much more effective on this stage for a similar reason. Both are also less vulnerable to gimps and offstage combos on this stage, particularly Link, who relies on his projectiles to space against opponents and avoid being hit offstage.
The structure to the right of the main platform, commonly referred to as the Tent, the Combo Tent, the Greenhouse, or the Rapetent, is known for its ability to start powerful combos, especially in Smash 64. By using aerials or throws that knock opponents into the walls of the Tent, powerful combos can be started, many of which can be finished with KO moves. This was made famous by Isai's "Greenhouse" combo with Pikachu, which involves using multiple up tilts, a back throw against the left wall, back aerial against the structure, up smash on the main platform (where the opponent will get knocked after being hit by the back aerial), and then a Thunderspike.
Forward and back throws can also be used to chaingrab the opponents against the walls to rack up more damage, and the up tilts may also be skipped if the opponent is already in the right position for a grab. Many other characters can perform their own variations of this combo. For example, Fox can use his back throw against the left wall to combo into a down aerial, which can subsequently lead into a regrab to continue the chain. He can also use the same throw to combo into an up aerial, which is a KO setup, especially against floaty characters.
Another advanced tent combo performed with Fox is the "shine pillar up smash" combo, popularized by The Z. It involves launching the opponent to the top of the structure with an up tilt, jumping up to the top of the structure, cancelling aerial momentum with a shine, then immediately using an up smash to KO the opponent while they are still in hitstun.
The only terrain effect are the four tornadoes, commonly called "nados" or the "nado" in the Smash 64 community, which spawn randomly over the stage. They tend to last around 10-20 seconds, and move randomly in a direction, although they may suddenly speed up and home in on a character. If caught, a character is held for about two seconds before being dealt 14% and thrown upward, KOing between 65% and 130% depending on weight of character and location of the tornado. The tornado's knockback is similar to a throw in which it cannot be SDI'd. It is possible to attack someone while they are in a tornado as well, and it is possible to hit the opponent with an aerial when they are released, including a meteor smash to knock opponents back into a tornado to rack up more damage. Tornados, due to their large vertical knockback, can also be used by Pikachu players to set up Thunderspikes if the opponent is caught in one. If a tornado speeds up and/or catches a character, it tends to spend less time on stage. The image to the side show the locations of the four tornados/nados spawns.
In Smash 4, the tornadoes no longer speed up randomly and stay at a constant slow speed. CPUs may try to dodge the tornado or simply just run into it.
Ω forms and Battlefield form
In Super Smash Bros. 4, the Ω form is set on a flat version of Hyrule Castle that extends below the blast line. The three soft platforms of the regular form and the gazebo-like structure are removed, and tornados do not appear.
In Super Smash Bros. Ultimate, the Ω form and Battlefield form are identical to SSB4's Ω form; however, the main platform does not extend below the blast line and is resized and reshaped to match Final Destination and Battlefield, respectively. The three soft platforms of the Battlefield form are based on the ones of the regular form.
With hazards off in Ultimate, the tornadoes do not appear.
Ever since The Legend of Zelda: A Link to the Past, there has been a Hyrule Castle where Princess Zelda and other members of the Royal Family of Hyrule live. The Hyrule Castle seen in this stage is based around The Legend of Zelda: Ocarina of Time. This stage is a mostly accurate rendition of the castle seen in Ocarina of Time, with the addition of platforms that go up the middle tower. The spire on the right has also been turned into a gazebo-like structure.
Another recurring Zelda locale is Death Mountain, a volcanic mountain usually found in the northern region of Hyrule. The Ocarina of Time version of Death Mountain appears in the background of this stage, which is consistent with its location in the original game.
In The Legend of Zelda, a recorder can be played to summon a tornado, which teleports Link to dungeons dependent on the direction he faces. This is the only Zelda game before Ocarina of Time to feature a tornado. In this stage, there is a tornado that throws players upward. The tornado itself could be a reference to The Legend of Zelda, but its gameplay function is unrelated.
According to the American Smash 64 ruleset, Hyrule Castle has been considered to be a banned stage as of 2014. Although it was considered to be the second most neutral stage, behind Dream Land, for a long time, the disadvantages of the hazards and features of the stage have become more apparent in the more recent metagame. The tornado hazards on the stage are known for appearing completely randomly, without any indication of the position where the tornado appeared if the tornado is outside of the screen's reach. The tornadoes also speed up at random times, which can catch even more wary players offguard, and fully cover options that would have otherwise been completely safe. The stage's large size also allows significant camping in certain positions, as in certain matchups it is possible for one player to camp on the far left of the stage and make it extremely difficult for the opponent to approach safely: a primary example is Kirby against Captain Falcon, as Kirby can stay on the far left of the stage and space up tilts and back airs to cover all of Captain Falcon's safe approach options, with a match between Mew2King and Stranded involving this technique being infamous. It is also possible for several characters to camp the top platform, such as Pikachu and Kirby: this was made famous by SuperBoomFan who had a 52 minute game with Gerson.
Bane is often credited for being a significant contributor to the banning of Hyrule Castle, detailing the disadvantages of the stage in a SmashBoards thread named A Case Against Hyrule, and also comparing the stage's legality to other stages. However, Hyrule Castle remains a popular stage among many players due to the unique combos possible in the tent portion and the strategies that are usable due to the stage's structure. Due to the Gentleman's Rule, Hyrule Castle can still be seen in tournaments if both players agree to playing on it.
Hyrule Castle has always been banned in the Japanese ruleset, as Dream Land is considered the only neutral and legal stage in said ruleset. The Peruvian ruleset contrasted with this for a long time, as Hyrule Castle was considered to be the main stage up until Boom went to Tacna. Hyrule has now been phased out entirely for Dream Land, due to the same reasoning, and in Super Smash Bros. 4 and Ultimate, Hyrule Castle is banned in all serious tournaments regardless of region.
Super Smash Bros. 
Super Smash Bros. Ultimate
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