I'd act like I don't know who he is, then walk up and go "Say, mind if I tag along with you?" Then I can become a trainer for real! XD Yes! I'd take advantage of the little guy! lol
James: Duh, steal his electric rat! Jessie: Ты are talking about Pikachu, right? James: Then give it to the boss, and get a promotion! Meowth: I want some рис, райс Balls!
If I saw Ash walking past me, I would introduce myself first. Then, I would become good Друзья with him. And then, I'd give him a big hug!! <3 ^_^ And after that, I'd ask Ash if I could Присоединиться him on his Pokemon journey!! :D
Ask to Присоединиться him and say give me your bulbasaur. If he asks why I'll say so I can train him. And whisper plus he'll be able to evolve hehehehe.