amiibo Wiki: Battle Arenas

Battle Arenas are a feature introduced in Super Smash Bros. Ultimate that allows up to eight players to congregate and battle in an online lobby. At first, Battle Arenas did not support Figure Players in any capacity; however, amiibo functionality was eventually added in the game’s version 3.1.0 update.

General Information

Battle Arenas are generally the easiest and most accessible method of battling other players’ FPs. Access only requires a Nintendo Switch, a copy of the game, a fully-trained amiibo, and an active Nintendo Switch Online subscription. FPs do not learn from matches that take place in Battle Arenas, and thus their progress cannot be saved afterward. Furthermore, FPs will take their owner’s place in battle; it is impossible to play against your own amiibo in a Battle Arena unless you have two Switch consoles and two copies of Super Smash Bros. Ultimate.

When they were first introduced in 2019, Battle Arenas lacked hack checks of any kind. As a result, FPs with blatantly illegitimate stats (32,000 in attack and defense, for example) were permitted to participate. Hack checks were later implemented in early 2021, and usually prevent FPs with impossible stat totals from participating in matches. Strangely enough, FPs of unreleased fighters are allowed in Battle Arenas, even if they are being accessed via game-altering modifications.

Despite the ease of access of Battle Arenas, they are not often used to host amiibo tournaments. This is for several reasons; for one, FPs have been noted to act much differently in an Arena than they do in offline matches. This may be because the training data has to be temporarily uploaded to a server, but the true reason for the apparent change in behavior is unknown. Another reason is that FP Spirit teams cannot be turned off; it is also impossible for a player to check their opponent’s Spirits to ensure none of the effects they are using are banned from competitive play. Furthermore, file submission tournaments do not require that the FP’s owner be present in an Arena to play their match. The convenience of sending an amiibo file via Powersaves and then waiting for the tournament results in the background has made these types of competitions much more popular.

Players are advised to be cautious around opponents who use Mii Fighter FPs in Battle Arenas; if their Mii data is corrupt when they are summoned into battle (which can only be done on purpose and through hacking), all Switch consoles connected to the room will crash to the home screen. Thus, it is possible for a malicious player to enter an Arena and purposefully crash the Switch consoles of everybody participating. Another Arena-related quirk is that – if a scanned FP is not properly added into the match – it may present itself as a Level 0 Mario FP (which is the default character used when the game becomes confused).

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