Professor Cozmo is an meteoriticist who lives in Fallarbor Town in Hoenn.

In the games

Professor Cozmo leaves either with Team Aqua or Team Magma for the Meteor Falls, thinking that they were going to help him excavate meteors. However, the offending Team steals the meteorite. The playable character then gets it back for the Professor in exchange for TM27, Return.

In Pokémon Emerald, it is Team Magma that tricks him and steals the meteorite, intending to use it to power their machine at Mt. Chimney. After defeating the grunts and the Team Magma Leader, Maxie, the playable character can take the meteorite from the machine.

In the anime

In Fight for the Meteorite, Professor Cozmo meets Ash Ketchum on Mt. Chimney. The situation from there is similar to in the games.

In the Pokémon Special manga

Professor Cozmo believed Team Aqua to be noble heroes, so he assisted them with the meteor and their device on Mt. Chimney.

He's apparently good friends with Roxanne, and was once her teacher.

In the TCG

In the EX Deoxys and EX Holon Phantoms expansions of the TCG, he appears on a card called Professor Cozmo's Discovery.

Misc

Names

Professor Birch • Mom • May • Brendan • Wally • Wanda • Steven Stone • Wallace • Scott • Mr. Briney • Mr. Stone • Gabby and Ty • Lanette
Brigette • Professor Cozmo • Pokémon Fan Club Chairman • Rydel • Winstrate family • Captain Stern • Trick Master • Treasure Hunter • Dock
Apprentice • Pokémon Center Ladies • Old guys • Mr. Bonding • Teala • Aarune • Lisia • Zinnia • Looker • Inver • Chaz • Fossil Maniac • Kiri • Memory Girl
Team Aqua • Team Magma • Gym Leaders • Elite Four • Frontier Brains • Battle Chatelaines • Gym guide • Name Rater • Day-Care Couple • Stats judge