An Assist Trophy is an item found in the Super Smash Bros. series, beginning with the Wii game Super Smash Bros. Brawl. It is similar to the Pokéball item, as when thrown, a character from a video game will appear, and will usually have a positive effect for the user who threw it.
A pair of sisters from the WarioWare series, Kat & Ana move across the screen, damaging opponents that touch them. They have the same purpose as Latias and Latios
A mole from the Animal Crossing series who, just like in the games, gives long and boring lectures, which tend to block either the top half of the screen, or the player damage levels, and sometimes the dialogues interact with certain events in the battle. Like Nintendog, he isn't a positive effect for anyone.
The Nintendog was the first Assist Trophy character revealed. However, it is one of the few characters that aren't positive for either the tosser or his opponents, as the dog will block the screen.
The demonic bartender who serves as a merchant in the Bayonetta series. He is in reality the strongest regular angel in existence and was casted down to Inferno in the distant past. When summoned, he will start attacking the opponents with his own version of the wicked weaves before leaving an usable item upon departure.
A character from the Mario series known as Luigi's rival and as Wario's partner in crime. He will bash characters with his tennis racquet when summoned.
