Cartoon Network Punch Time Explosion XL

The Dexter’s Lab Theme is the seventh “Chapter” in the game. There are three parts to this Theme. Defeat the final boss in Part 3 to unlock this trophy.

At the end of this Theme, you will have:

• Monkey (Character)
• Multiplayer Level – Dexter’s Lab Stage 2
•  Dexter’s Lab Fan
•  Samurai’s Journey (Only available in Level Select)

Here is a rough guide on how to complete this theme:

• Part 1: Run along killing enemies until you get to a giant robot with Monkey in a lab cage behind you. Destroy the 4 electric plugs as they light up (1 at a time). The robot will shoot a laser but will only hit you if you’re standing on the top platform. Killing the enemies will just spawn new ones so try and avoid them if possible while going for the plugs. 
  Ride the tank through the corridor and shoot everything you can. Afterwards, run along the conveyer belts while jumping over the lasers and timing your run with the pistons. When you get to the orange fist symbol, smash the computer standing next to you to open the door. Defeat the required number of enemies to defeat the robot and continue. You’ll get to a part where you have to float down while avoiding lasers, hold  to slow your fall. Run to the third and final robot. Like the second robot, defeat the required number of enemies to bring him down. You can easily knock the enemies off the ledge here.
• Part 2: You’ll fight Father while Dexter’s Lab burns to the ground. There will be a large rocket that comes out of the middle of the lab that you can hit to destroy and open the level back up. An Assist Block spawns on the right platform. Get those as much as you can and burn him down to defeat him.
• Part 3: Defeat Aku. See Samurai’s Journey trophy for tips on this fight. You’ll have to defeat him in two different parts to complete this level/Theme.