Dexter's Laboratory: Ego Trip

Dexter is confronted by robots who vow to destroy the one who saved the future, and he uses his time machine to see how he saved it. The intruders declare that they are here to destroy the one who saved the future and prepare to attack Dexter. Dexter easily defeats them with a variety of tools and gadgets from his lab. However, news that he is The One Who Saved the Future intrigues him, and he decides to travel through time to discover how cool he is. In the first time period he visits, Dexter encounters a tall, skinny, weak version of himself working in office-designing cubicles, with Mandark as his rich, successful boss. The child Dexter unwittingly reveals the existence of blueprints regarding the Neurotomic Protocore, and Mandark steals it after the two Dexters move forward in time.