A weak, tall adult Dexter working a miserable office job for his boss, Mandark.
A buff, rugged version of Dexter who lives in a desolate future where Mandark has taken over the world. [S5E7] Ego Trip
Together, the four Dexters engage in an epic "four-on-four" battle against various versions of Mandark. Dexter's Laboratory: Ego Trip (TV Movie 1999) - IMDb A weak, tall adult Dexter working a miserable
A wise, elderly version who holds the final secret to defeating Mandark. Mandark. A buff
The plot kicks off when robots from the future invade Dexter's lab to destroy "the one who saved the future". Intrigued by his own eventual greatness, Dexter uses a time machine to travel forward and meet his future selves: