First introduced at Jubilife City, he, and his partner Diamond wins the Judges' Special Merit Prize. When leaving the Grand Prix, Prof. Rowan's envelope gets mixed up with the two boy's grand prize, accidently making them unknownly accept the mission to guard Platinum on her journey to Mt. Coronet. Pearl and Dia believe they are on a reality show, while Platina, known as "Missy" at the time, think of them as her bodyguards.
Both Dia and him had fought and almost broke their friendship because, from what Dia said, he is always treated unfairly.
Chatler, like his trainer, is impatient, very quick, and easy to irritate. His nature is hasty, always getting carried away easily. He is Pearl's first Pokemon in the mangas.
Chatler's known moves are Chatter, Mirror Move, Pluck, Fury Attack, and Arial Ace.