Pyra

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

From NintendoSource

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

Community-reported

• Unlock special costume designs on the first scan, plus useful items or experience. Costumes are also obtainable through gameplay. Each amiibo once per day, up to three different amiibo per day.

From NintendoSource

• Unlock a character-specific weapon skin for characters using the Swordfighter Class

Community-reported

• More easily unlock special costumes / Receive useful items and experience points

Community-reported

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

From NintendoSource