There are two human members of the group. Their names are Jessie and James. They are members of Team Rocket and they are ready to fight anyone and everyone.
He wants to be the best trainer ever like no other Pokemon Trainer, Gym Leader, Champion, Master there ever was. He wants to be the best the pokemon world has ever spotted.
Wait. Plan change. Ash wants to be the best and be better than any other pokemon trainer. He wants to beat everyone and be the very best trainer he can be. He wants to capture more pokemon than anyone else. He just wants to be the best of all.