Cartoon Network Punch Time Explosion XL

Dexter's PTE move turns him into Dexo Robo 2000. (On Easy) Go to Story Mode - Level Select - Samurai Jack Theme Stage 4. Choose Dexter as your main character (it doesn't matter who the other 3 are). 30 Enemies will spawn that you need to defeat. Kill them until your energy bar is full and hit  to use your PTE. Kill 2 enemies while the PTE is active to earn the trophy.