Here comes history, so, get the popcorn, and have fun:
Well, Kim is 10 years old, then you ask:
You: Ahh, what it does in Team Aqua then?
I: His parents were ex Team Aquas Grunts, EX, because they died in an accident during a mission... *Snif snif*
And she was forced to work for them, blah blah blah...
She was the first "Partner" of Combusken/Richard (Yes, she came before Katarina, the Combusken met her in Hoenn (11 years old), in his first journey, then he went to Taya alone (12 years old) and met Katarina, BUT after that, he returned to Hoenn (13 years old), just to join a small expedition, so the girls met, but the principal, when Richard and Katarina went back to Taya, he gave his cap to Kim) Kim followed journey with him, because, after a 3 battles, Combusken wondered her age, blah blah blah, she "repented" and left the Team Aqua, and fought against it ... AH! I almost forgot, Combusken and Kim made a common good promise... JUST FRIENDS, kid stuff, you know? (This gave a chance to Katarina in the future, and of course, when teenagers ("Teen" Katarina and Combusken (17 years old)), they tur... *ERROR*PROBLEM IN THE TRANSMISSION* TURNING OFF*)
Here probably comes "Not Team Aqua - Kim Sprite".
Team Aqua Grunt Kim