Death Squared (UP)

Start up Party Mode level 1 and line up all four squares on the very bottom path. At the same time, have all four squares walk off the ledge and fall to their deaths. They should all explode at the same time (or close enough to) for the trophy to unlock.

This can be done with one controller. When all the Squares are lined up, treat them as two pairs: Red and Blue ( and , respectively), and Green and Yellow (+ and +, respectively). Very slowly inch each pair up a little bit at a time, alternating between the two. They will eventually start to lean off the edge and the instant one group falls, quickly change to the other and have them jump off as well. They should all explode relatively close to each other, unlocking the trophy.