Where do I find Chet R. Chase on Sims Bustin out for GBA?

I've recently gotten addicted to sims bustin out for the gameboy advance again. And I'm on the 4th file mission 4 and I need to befriend Chet R. Chase. Except, I haven't even met him yet. In another file, I have, but I can't remember where! I need to know places where he could be, please so I can finish the mission?