Crossover Couples Part 3 (My Final Favorite 3 Couples)

My final 6 favorite characters in my favorite 3 pairings.

Ash Ketchum/Starfire: ???
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Characters:

 * Ash Ketchum (???)
 * Starfire (Hynden Walch)

Villains:
???

Yugi Muto/Dawn: ???
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Characters:

 * Yugi Muto (Dan Green)
 * Dawn (Caitlynne Medrek) - from Total Drama: Revenge of the Island

Villains:
???

Danny Fenton/Juniper Lee: ???
???

Characters:

 * Danny Fenton/Phantom (David Kaufman)
 * Juniper Lee (Lara Jill Miller)

Villains:
???