Olimar

• Unlock an amiibo-exclusive character-themed aircraft, plus a bonus tuning part

Community-reported

• Unlock figure in an amiibo-exclusive pose of the character (requires Chibi-Robo amiibo)

Community-reported

• Call in four backup Pikmin
• Figure appears in-game and can be collected to gain energy points

Community-reported

• Give Kirby a Copy ability based on the character's abilities and a health item

Community-reported

• Unlock a character-themed Mii racing suit

Community-reported

• Unlock a Pikmin-themed Mii racing suit

Community-reported

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

From NintendoSource

• Unlock a character-based Mystery Mushroom costume

Community-reported

• Battle and train up a computer-controlled Figure Player of the character

Community-reported

• Battle and train up a computer-controlled Figure Player of the character

Community-reported

• Battle and train up a computer-controlled Figure Player of the character

Community-reported

• Receive a sketch of the character from Wario which can be exchanged for in-game coins

Community-reported

• Unlock a character-based Yoshi yarn pattern

Community-reported

• Unlock a character-based Yoshi yarn pattern

Community-reported

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

From NintendoSource