|First Appearance:||FireRed and LeafGreen|
Celio is a scientist that lives in One Island. He wants the player to find the Ruby and the Sapphire so that he can finish his machine. Doing this will allow the player to trade between FireRed & LeafGreen and Ruby, Sapphire & Emerald games.
FireRed and LeafGreen
- Main article: Celio (Adventures)
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