Unlike the other Ape Escape games, this game is more of a party game, similar to Mario Party and Sonic Shuffle. The game consists of minigames that the player must finish to pass. The story mode is broken up into different tournaments with 3 to 4 players, where 1 to 2 players must finish at least 1st place to pass. Usually, two types of events occur after the player finishes a tournament: a movie featuring the player's character of choice and monkeys, or a cutscene followed by a boss battle, this is the first Ape Escape game to have a rating higher than an E.
Source: Wikipedia, "Ape Escape: Pumped & Primed", available under the CC-BY-SA License.