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, accidentally making them unknowingly accept the mission to guard Platinum on her journey to Mt. Coronet. Pearl and Dia believe they are on a reality show, while Platinum, known as "Missy" at the time, think of them as her bodyguards.
Both Diamond and him had fought and almost broke their friendship because, from what Dia said, he is always treated unfairly.
Chatler was Pearl's first Pokemon, it was first seen in Stagestruck Starly. It is easily angered like its owner and it is also used to spy on Platinum. He is Pearl's main and only flying Pokemon.
Chimler was chosen by Pearl as a Chimchar, it seemed to lazy and likes to race. It is a very strong battler and shown when Platinum used it against Maylene. It evolved into Monferno with Tru and Prinplup while training for Platinum's first Gym Battle. It later evolved along with Tru at the Veilstone Department Store.
Zeller was first seen when Crasher Wake suggested Pearl should catch one. After many attempts, he finally caught one. Zeller was shown to be very hostile to Pearl by biting his head when called, it later opened up to Pearl and was shown to be a good battler.