Bowser

• Unlock a character-themed aircraft early, plus a bonus skin and tuning part

Community-reported

• Unlock the Chain Chomp weapon

Community-reported

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

Community-reported

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

Community-reported

• Receive a helpful item

Community-reported

• Unlock character cards to help you in battle

Community-reported

• Receive a stamp and equipment for the main quest

Community-reported

• Unlock a character-themed Mii racing suit

Community-reported

• Unlock a character-themed Mii racing suit

Community-reported

• Customize game board in amiibo Party
• Use as game piece in amiibo Party

Community-reported

• Play as or receive bonus from this character, depending on the mode

Community-reported

• Minigame Island: If you land on an amiibo space, use to receive coins / Use to revive your character once

Community-reported

• Use a tennis ball design based on the character (cosmetic only)

Community-reported

• Play alongside and train up a computer-controlled character

Community-reported

• Unlock an armor paint job based on the character

Community-reported

• Unlock an armor paint job based on the character for use in Blast Ball

Community-reported

• Unlock a character-based costume

Community-reported

• Unlock a character-based costume

Community-reported

• Play stages as a Mini version of this character, with a unique special ability, and unlock character-specific stages

Community-reported

• Play stages as a Mini version of this character, with a unique special ability, and unlock character-specific stages

Community-reported

• Unlock a character-based puzzle

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

• Receive a Super Star in Super Mario 3D World. In Bowser’s Fury, trigger Fury mode.

From NintendoSource

• Change Bellabel Park flowers and decorations to a character theme; receive an item when scanned during a course.

From NintendoSource

• Receive a helpful item depending on the character

Community-reported

• Unlock a character-based Mystery Mushroom costume

Community-reported

• Reveal regional coin locations

Community-reported

• Unlock the character's shiny sticker

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 costume

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