Celio (Japanese: ニシキNishiki) is a Pokémon Storage System Programmer from the Sevii Islands in Kanto.
Celio was born and raised on One Island in Kanto, and eventually grew up to run the Pokémon Network Center.
The Alexis Saga
He first appeared in On the Road Again! when Lexi met him on One Island after being given a ticket by Professor Rowan. He asked Lexi for her help to finish the incomplete Pokémon Network machine. After she had initially helped, Celio gave her a Rainbow Pass in order to get to the locations of the final four Sevii Islands to obtain the Ruby and eventually the Sapphire, and entrusted her with a Pokémon Egg that hatched into Shaymin.