PS3 version of Disney Infinity 2.0. trophy boost help?

The only way to get a 4-player game is to invite friends into a game. At a minimum, you'll need 2 people with 2 controllers each. Enter Toy Box mode and activate your second controller/character, then invite a friend to join you. Once they join, have them activate their second controller/character. As with Double Trouble, the trophy pops as soon as all 4 characters are in the game.

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