Prickle is a Chikorita Rogue. I actually wanted to base her personality off of Ash's Chikorita from the anime, she was such a baddy and sorely underappreciated! I wish they had given her a full character arch like Charizard cause she was not just another teammate but had a distinct and lively personality!
When she was first introduced she wanted to throw hands with ANYBODY and was beating through Ash's team until he pulled out Charizard and even then she used a vine to pull Charizard's foot out from under him and knock him over.
Then Chikorita developed a adorable little crush on Ash but couldn't stand Pikachu, so she ran away one episode just so Pikachu would give her some space and ended up running into a gang of Fighting type pokemon...and then Beat up their leader and made herself their new boss! All hail the Prickly Pear!

Prickle is fiery, proud, and stubborn. She is quick to start a fight and prove her might against anyone, especially those who show excessive arrogance and look down on her, although sometimes she may just be quick to judge and believe somebody is looking down on her when they actually had no malicious intentions, it was all just her own insecurities making her jealous. There are a few pokemon she actually likes but she mostly shows her prickly side...if only there was a word for that kind of personality ;P