Sylux

• Unlock a special costume

Community-reported

• Unlock a Metroid-themed Mii racing suit

Community-reported

• View a particular completed cutscene after beating game without needing 100% completion / Hear a random voice line from Sylux

Community-reported

• After finishing the game, access the full version of a cinematic. Scanning also plays a random Sylux voice line. The cinematic can also be unlocked through 100% scans and item collection.

From NintendoSource

• Receive a random title or avatar item, up to five times a day. Each amiibo can be used once a day.

From NintendoSource

• Unlock randomly assigned three-minute NES or SNES game scenes. Subsequent scans change the scene.

From NintendoSource