Mike Morningstar is a Plumber's kid who appears in the Ben 10: Alien Force episode "All That Glitters". He has the power to drain the life force from women and turn them into zombies under his control. Mike can use the energy he drains for flight, super strength, super durability, and to fire destructive energy blasts. His victims (or will be victims) usually have his mark on their arms. He is defeated after absorbing energy from Gwen Tennyson who in turn absorbs his energy, depleting most of his power. His other zombified victims likewise turn on him and drain what little energy he has left, leaving him withered and powerless. Afterwards, Kevin crushes his Plumber's badge stating, "You don't deserve this." Mike Morningstar is a leech and Zombie Boy. Mike Morningstar is is possibly a member of Vladite alien species like his dad Mr. Morningstar.

Darkstar

Mike Morningstar returns in Darkstar Rising as Darkstar, after he becomes zombified. Darkstar can shoot black energy blasts. After Ben defeated Darkstar, he was imprisoned in the Null Void. In "War of the Worlds he was freed from the Null Void because he was recruited to help battle Highbreed forces, and Ben needed as much help as possible. At one point he tries to absorb some DNAliens' life force and his face almost turns back to the original, until Ben tells him to stop and turns back zombified. At one point he escaped which may mean he will appear once more.

Darkstar return in "Trade-Off", he and Kevin make a team in search of an ancient artifact called the Dominus Librium, that returns to normal but without his powers and restoring Darkstar's face. However, Morningstar keeps the Librium, which absorbed both Kevin's and his powers, and used it to absorb Gwen's powers again as well as Ben. Kevin destroys the Dominus Librium and return to their mutant and zombified forms, while Ben and Gwen get their powers and youth back. In a rage, Darkstar escapes swearing he'll make them all pay one day.

Mike Morningstar's/Darkstar's First Appearance
All That Glitters

Mike Morningstar's/Darkstar's Last Appearance
"Trade-Off"