Drilling Deep is the third episode of Mega Man: Fully Charged. It first aired in the United States on Cartoon Network on August 12, 2018.
When Aki, Suna, and Bert were going to school, a drilling robot appears and attacks construction vehicles near the area. Aki changes into Mega Man and tries to stop the robot, without success. When Mega Man replicates the robot's schematics, he loses control of his body and starts spinning around, and the robot escapes.
At school, Aki struggles with the side effects of his newly replicated schematics, causing him several embarrassing situations. Later, Suna informs him that the robot is attacking Skyraisers Inc, and he becomes Mega Man to stop him. Drill Man introduces himself and says that Skyraisers Inc ruined his dreams of becoming a musician, and wants revenge. During the fight, Mega Mini solved the side effects from Drill Man's schematics and Mega Man learns to control Fire Man's powers, using it to thwart Drill Man's assault by overheating his drills. Mega Man offers to help the defeated Drill Man, but he refuses and escapes.
- The pixelated scene with Drill Man explaining his past features a modified theme music of Drill Man's stage, from Mega Man 4 game, and the scene also shows art of game stage itself.
- In this episode, there is a hint of Bert Wily's connections to Dr. Wily.