Hello. When you say "decent level" what level range are you wanting specifically? Since you're offering a Moon Stone, I'd assume you're at Castelia City or almost there. I could train you a Squirtle/Wartortle if you want.
Hi, welcome to Pokecommunity! :) I'll gladly help you with trading. Just send me a visitor message (VM) or private message (PM) if you see me online. We can also do it on a specific time, if you tell me your time zone.