Battle Arenas are a feature in Super Smash Bros. Ultimate that allows players to congregate into an online room. In patch 3.1.0, amiibo functionality was added to Battle Arenas, thus allowing them to be used online for the first time in half a decade.
To add a Figure Player to a Battle Arena, a player should enter the character selection screen and hover over their slot (under the name tag menu). Assuming the arena settings allow amiibo, an FP can then be added in place of the player. Players cannot fight against their own FP in a Battle Arena, as it replaces their spot. FPs still learn from opponents online; however, their progress cannot be saved.
Players are advised to be cautious around opponents who use Mii Fighter amiibo in Battle Arenas; if their Mii data is corrupt when they are summoned to battle (this can generally only be done purposefully), all Switch consoles connected to the room will crash to the home screen.
If you would like to return to the amiibo Wiki, please follow this link to return to its master list.