In the Stakes miniseries, Marceline consults Princess Bubblegum to make her mortal again and give up her vampire powers, but doing so ultimately resurrects The Vampire King and his followers.
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Top 10 Cartoon Network Heroes Who Made Things Worse
#2
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EmperorMathias
The Eds (Ed, Edd n Eddy)
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#3
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Blossom, Bubbles and Buttercup (The Powerpuff Girls)
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#4
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Rex Salazar (Generator Rex)
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#5
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EmperorMathias
Gwen Tennyson (Ben 10: Alien Force)
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EmperorMathias
3 years ago Report
In the episode "Time Heals", Gwen goes back in time to prevent the accident that transformed Kevin Levin into a monster from ever happening. Unfortunately, however, she ended up changing history in which Hex conquers the world