Assist Trophy

An Assist Trophy is an item that, when grabbed, summons a random non-playable character to aid the player who summoned him. Assist Trophies work nearly identical to Poké Balls and Battle Cards. However, no Pokémon or Kingdom Hearts characters come out of them, and once an Assist Trophy is grabbed, it is automatically activated, assuming the holder is standing on the ground, and not in a jump, attack, or hitstun. Basically they are "guest" characters separate from the playable roster.

List of Assists Trophies

 * Amigo: Plays a Latin rhythm, which causes all grounded opponents to taunt uncontrollably until he leaves the screen.
 * Bandana Dee: Charges at opponents and jumps around. Very weak and can be defeated with a few weak attacks.
 * Light Yagami: With the help of Misa Amane, who spots one opponent, he uses the Death Note to write the name of the character previously spotted in order to KO him/her after a 10 second timer has ended. Due to his cheap nature, Light Yagami is the rarest AT to appear.
 * Metroid Hatchling: Latches onto an opponent and gradually increases their damage for a certain time. Can be attacked to prevent it from latching.
 * Pac-Man: Follows directions from the summoner and chomps down opponents to send them flying with high knockback.
 * Proto Man: Uses his Proto Buster (uncharged and charged) while jumping around and dashing across the stage, occasionally charging with his Proto Shield.
 * Renji Abarai: Attacks with several combos while jumping and running around the stage, culminating with his strong Bankai: Hihiō Zabimaru.
 * Starfy: Attacks by performing a series of spinning moves with short range that trap nearby opponents. Weak, but hard to defeat.

External link

 * What are Assist Trophies?