Prepare for Impact! was a special minigame Poptropica released to celebrate the release of Red Dragon Island, it also came with the Red Midnight Ninja.
To win the game, you must go against other Poptropicans in a sumo match. Once the Gyoji (referee) shouts to begin, you must click rapidly right away. The fastest one to begin clicking will shove their opponent off and win a prize. The game continues and more prizes are won, but only members can receive the last prizes.
This and Shrink Shot are the only Free+ minigames in the store.