amiibo are a series of "toys to life" based on characters from Nintendo franchises. Games can choose to do various things when an amiibo is scanned, such as having the depicted character appear or awarding some other bonus.
The first Xenoblade Chronicles-related amiibo to be released is the Shulk amiibo, released as a part of Wave 4 of the Super Smash Bros. series of amiibo on 2015-02-01 (which started as a GameStop/EB Games exclusive in North America). Super Smash Bros. series amiibo for Pyra and Mythra from Xenoblade Chronicles 2 were released on 2023-07-21. Noah and Mio amiibo are set to be released on 2024-01-19.
Use in the Xeno series
Using a Shulk, Pyra, or Mythra amiibo for the first time unlocks a skin of the respective character's weapon for the Swordfighter class. These can also be unlocked by non-amiibo means: Shulk's by clearing the game, Pyra's by getting all classes to rank 20, and Mythra's by Uniting the Seven Nopon and upgrading all the party's Blades.
Using a Noah amiibo unlocks Consul N's outfit for Noah and "Leisure Time" outfits for Noah, Eunie, and Lanz, while using a Mio amiibo unlocks Consul M's outfit for Mio and "Leisure Time" outfits for Mio, Taion, and Sena. These will presumably also have non-amiibo unlock methods, but this is currently unconfirmed.
Use in other games
On other wikis
The following list includes only games that have unique behaviour for amiibo in the Xeno series. Games that treat such amiibo as being in a "generic" or "other" category are not listed.
Chibi-Robo!: Zip Lash
Using a Shulk amiibo in Chibi-Robo!: Zip Lash unlocks a statue of Chibi Robo mimicking Shulk's pose.
Kirby: Planet Robobot
Super Mario Maker
Super Smash Bros. 4 and Super Smash Bros. Ultimate
Using a Shulk amiibo in Super Smash Bros. for Nintendo 3DS, for Wii U, or Ultimate brings a Shulk FP (figure player) into the game, which can fight alongside or against the player to have it learn techniques, gain experience, and be customized. Using a Pyra or Mythra amiibo in SSBU does the same.