Arena Ferox

Arena Ferox (, Felia Arena) is a stage in and Super Smash Bros. Ultimate. In Smash 3DS and Ultimate, Lucina is fought here when being unlocked and Chrom is also fought here for his unlocking battle in the latter.

Stage overview
The Arena Ferox stage consists of a flat, medium sized stone platform. Similarly to Pokémon Stadium, the layout changes periodically. There are five different variations that can appear, in random order.

The first variation features destructible statues similar to those found in the second segment of Castle Siege. Both statues hold up soft platforms, with the left one holding one at an angle into the stage's center, while the right one holds two on top of each other: the bottom one is angled towards the center of the stage, and the top one is parallel to the stage's floor. There are crumbling pillars in the background.

The second variation features a moving set of gears with moving soft platforms to its left. Just right of this mechanism is a large, hard platform. To the rightmost part of the stage is another soft platform, which is the closest to the floor of the three platforms.

The third variation features two high, hard platforms at each end of the stage. The rightmost platform turns into a wall that connects to a small soft platform. In the middle of the stage is a similar structure to the rightmost platform, only with a high soft platform instead of a high hard platform. There are crumbling pillars in the background.

The fourth variation is the only one to be symmetrical, aside from the stage's default, flat form. It includes three soft platforms suspended by chains, in a somewhat similar layout to. In the middle of the stage is a wall that suspends another soft platform. A wooden tower and wall appear in the background.

Ω forms and Battlefield form
In Super Smash Bros. for Nintendo 3DS, the Ω form only has the main platform featured. The stage also does not transform.

In Super Smash Bros. Ultimate, the Ω form and Battlefield form are similar to SSB4's Ω form with the addition of the rubble in the background; however, the main platform does not extend below the blast line and is resized and reshaped to match and, respectively. The three soft platforms of the Battlefield form are based on the ones in the normal form.

Hazards Off
With hazards off in Ultimate, Arena Ferox will appear in a random form at the beginning of the match and will remain in that form for the duration of the match.

In the first variation, the statues lose their hurtboxes and cannot be broken.

In the second variation, the moving platforms on the left still move.

In the third variation, no changes are made.

In the fourth variation, the chained platforms lose their hurtboxes and will not swing.

Tournament legality
Arena Ferox is a counterpick stage in, but is rarely seen due to the intrusive features of some transformations, and the general rarity of the 3DS version in competitive settings.

In Super Smash Bros. Ultimate, Arena Ferox is universally banned. Ironically, the stage hazard toggle used universally across tournaments makes Arena Ferox worse suited for competitive play than it was in SSB4, as the stage transformations are randomly picked at the start of the match and permanent; all transformations except the first have intrusive features such as caves of life and walls that make the stage unacceptable for serious competitive play.

Origin
This stage is based on the from . It is a gladiatorial combat arena located in the nation of Regna, a warrior nation that lets strength in combat dictate its politics, and the rulers of the nation regularly use it to determine their future successors. Early in Awakening, the main character,, traveling from the halidom of to the south, earns the support of the East-Khan, ; however, due to her having lost the last tournament to the West-Khan, , Chrom and his companions must fight in this arena to ensure that Ylisse's future dealings regarding recent threats to the continent can proceed. His opponent is a masked sword-wielder named after.

Update history
 3.1.0
 * Arena Ferox's on-screen appearances locations have been changed.

Trivia

 * Arena Ferox, in its original form from Awakening, is the setting of and 's reveal trailer, showing the two of them and Chrom fighting  (who was also revealed in the same trailer).
 * This is the first Fire Emblem stage in the Super Smash Bros. series to be based off of a particular location rather than a generic stage based on a recurring theme.
 * While the Super Smash Bros. for Nintendo 3DS version of this stage much resembles how Arena Ferox looked in-game in Fire Emblem Awakening, the Super Smash Bros. Ultimate version appears to take more after how the area looks in cutscenes in that game. This is evident through the lighting on the arena proper being much brighter than the lighting on the stands, putting more focus on the battle.
 * This is the only Fire Emblem stage to not have any walk-off blast lines.
 * In Ultimate, the following Assist Trophies can only appear on the Battlefield and Omega forms of this stage: Skull Kid, Jeff, Ashley, Riki, Dr. Wright and the Squid Sisters. The Moon cannot be summoned on this stage at all. Additionally, the following Poké Ball Pokémon can only be summoned on the stage's Battlefield and Omega forms: Togepi, Lugia, Gardevoir, Metagross, Kyogre, Palkia, Arceus, Victini, Meloetta and Xerneas.
 * The stage's name translates from Latin to "fierce arena".

Coliseo de Regna Ferox