Assist Trophy

An Assist Trophy is an item in Super Smash Flash 2 that, when grabbed, summons a random non-playable character to aid the player who summoned it.

Overview
Assist Trophies work nearly identical to Poké Balls. However, no Pokémon 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 characters released from Assist Trophies
These are the characters that are contained is assist trophies and can be released by players:

Trivia

 * Due to complications with some bugs, the Assist Trophies, Poké Balls, Bumpers, and Explosive Tags were disabled on demo v0.9b but were added back in patch 0.9.1.1965, except for the latter.
 * PAC-MAN and Bandana Dee are the only characters so far to be upgraded from an Assist Trophy to a playable character between updates.
 * Within the SSF2 Beta data, there are unused Assist Trophy files for Birdo from the Mario series, the Color TV-Game 15, Qbby from the BOXBOY! series and Sheena Fujibayashi from Tales of Symphonia.