The Assist Trophy
Assist Trophies are Items which were first introduced in Super Smash Bros. Brawl. When a character picks it up, they hold it over their head, and an assistance character pops out. These characters assist the player who had called them, using their own unique attacks to damage the other players.
On Mercurious, the Assist Trophies appear again as a form of submissions that the various members are able to post.