Claus is an adventurous but shy trainer who loves exploring. Because of his shyness, he prefers going alone because he tends to be very awkward when around people. He has a kind heart and despises evil in any form.
Grovyle is Claus's starter Pokémon, which was given to him as a Treecko after saving his father from a team of evil unknown Pokémon Trainers, using only his pet Purrloin. For some reason, he refuses to evolve into a Sceptile.
Purrloin was simply Claus's family pet until he used him to save his father, which resulted in him getting his Treecko. When Claus decided to go on a Pokémon journey, Purrloin wasn't allowed to go, but shortly after Claus left he snuck out of the house and found Claus, which resulted for a huge search for him commencing, although he was eventually found and sent back home.
Dragon Breath, Crunch, Dragon Pulse, Work Up
While exploring the Cliffside Caves, Claus encountered a Zweilous, and he decided to catch it. He tried battling with it, and it was way too rambunctious and hyper, sometimes not even attacking at all and running around like crazy.