In level 9-1 you will have to beat the foot, the purple dragon, and the mafia. Instead of doing that find the bus on the corner. Jump on it and smash the crates that are on the roof. When you see a chest, touch it and when your turtle says "This looks valuable lets take it to April" pause it and go to the map. After doing that go home and enter Aprils shop to have her appraise the item. This unlocks the arcade game that can be played from the title screen. Note: To control your turtle in the arcade use the arrows.
Playmates added to Bonus Materials: S R M L D D R
Super Offense Power: S D L S R L L