This is pretty cool so far. I can't wait to see where it goes.

those names are fitting

the demand for those berries will skyrocket with him in town

Well, this story looks like fun. Curious, though, when you do eventually send Ace back to the One Piece world, will he be able to speak English or will his attempts to talk come out as Poke speak and the humans won't be able to understand him? It'd be kinda funny if only Chopper could understand and translate for him like he does for animals. It would definitely be funny if Ace attacks Sabo and is yelling at him only for Sabo to not understand what he is saying.

"Sabo, what did you do to get the fire cat so pissed at you?"

"Nothing, I swear!"

"Torracat!(Sabo you bastard!)"

Regardless I am certainly looking forward to more, wherever you may take it.

Ace will have an interesting time ahead of him