An Assist Trophy is an item that, when grabbed, summons a Non-Playable Character that does an effect to help the summoner, before disappearing. Choices of various origins to quickly aid the holder, not to mention some assistants get in the way more than they help. Once an Assist Trophy is grabbed, it is automatically activated (though this is not very convenient), assuming the holder is standing on the ground, and not in a jump, attack, or hitstun. Only one Assist Trophy (and the character it releases) can be in a match at once. The next Assist Trophy will not appear until the data for the character it will release is fully loaded. As shown in Lawl Nova, there is an option in which Assist Trophy characters can be turned on or off, except Dio.