A/N: Smash Bros crossover.
Note 1: oc palettes are based off characters from the game that they would most likely appear in.
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Oc palettes -

Kai:
Pink (default)
Red (Michalis)
Green (Palla)
Blue (Catria)
Purple (Malice)
Black (Dark sphere)
Navy (Starsphere)
Shirtless
Stage: Macedon Castle
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Kay:
Gray (default)
White (Julia)
Red (Julius)
Blue (Seliph)
Black (Ares)
Green (Ced)
Yellow (Other enemy units)
Purple (Larcei)
Stage: Silsse Castletown
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Mitsu:
Red (default)
Orange (Luthier)
Yellow (Delthea)
Green (Alm)
Black (Berkut)
Purple (Yuzu)
Gray (Shade)
Blue (Rinea)
Shirtless
Stage: Fear Mountain
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While on their daily walk (or patrol), a letter flies over to oc. Upon opening it, they discover it's an invitation to the famous Smash Mansion.

A few seconds later, a glass staircase appears, leading up to the mansion. Oc begins to step onto the stairs, climbing each step one by one.

In the distance stands a figure, ready to fight.
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Note 2: Your oc can have up to 8 palettes. You can also choose to have your oc fight a character already in smash or their love interest.