From Bulbapedia, the community-driven Pokémon encyclopedia.
Pokémon Colosseum Snatcher Leo (Japanese:ポケモンコロシアム スナッチャーレオ), is a manga adaptation of Pokémon Colosseum's plot, starring Wes (Leo) and Rui fighting against Cipher. It is created by Oouchi Suigun, also known for the manga adaptation of Jirachi: Wish Maker.
Pokémon Colosseum Snatcher Leo has only ever been published in its original magazine. It was collected in three CoroCoro issues, ranging from January to March 2003.