Nobody wants to trade him.
"Unique, likely fictional, potentially immortal, very powerful Pokémon."
"So, if it's possible to get me back to my world they're the ones who can do it? I didn't get the impression that normal Pokémon are that capable."
"I cannot express how little I want to own this entity," Bella says. "I'm not even sure I want to escort him around looking for legendaries."
"You're not going to give me to anyone," Rashek says. "Traditionally, one can only give things that one owns."
"Semantics aside, what Larry meant was whether I was trying to con him into handing me the Pokéball currently associated with you," says Bella. "Which I don't want. Even handing it over long enough to release you would mean boxing one of mine for the duration."
Larry has multiple Pokéballs, and Rashek can't tell by looking which is associated but empty.
Bella facepalms. "Larry can replace your Pokéball if he takes it into his head to do so, Rashek, whatever property damage you're thinking of committing here. What you want him to do is let you go."
"I'm running out of steam here, guys," comments Joe wearily.
To Joe, "I should be able to understand them by now. Thanks."
(Joe wanders off. He stops providing a translation.)
"It would really be better if Larry released you of his own accord and you stopped resembling a Pokémon in front of people."
"Maybe this is just because I don't know how Pokéballs work, but if that happened couldn't someone else capture me?"
"People don't normally throw Pokéballs at humans, and if you dressed less outlandishly and didn't pick fights with wild 'mon you'd look like a human," says Bella. "Right now you are attached both to your Pokéball and to Larry. If you take the ball, or damage it, he can replace it and put you in a new one if he wants, which I assume you'd just as soon skip. Meanwhile, you're taking up one of his slots and I assume you have no intention of helping him win the guild tournament next month."
Does this work outside of throwing distance? I could easily leave town and wait until he wants the slot for an actual Pokémon.
Local clothes are a good idea, but I did just appear on this planet, and was in a Pokéball for most of it."
"He can't wear a tournament uniform," says the blue-haired girl, "he's not an Ace, it's not a tournament, and anyway we don't have any in his size, he's too tall."
"Look," says Bella. "Larry. Let him go already. Register your release with the Pokécenter network if you want."
Larry frowns.
Where do people normally acquire clothes here? I can probably barter something."
"I caught him fair and -"
"You exploited his weird Legendary Space Human properties to imprison him. You have more than used up any good will you might have earned saving him from the Murkrow. Call it a day, go catch an Abra if you want a psychic 'mon."
"That's what people use Pokemon for? I'm sure I could find more than enough monsters to fight if for some reason I wanted to, and I'm certainly not doing it on your behalf. You would be better off with literally any Pokemon."
"Ugh," says Larry, "fine," and he fiddles with the Pokéball.
"I should probably be asking a lot of questions about how this world works, but clothes first. It wouldn't do to have this happen all over again."
"I'll show you the place," sighs Bella. She walks, slowly and carefully, to the door of the building; there, she tosses one of her Pokéballs, which yields a horse that is on fire and seems remarkably unconcerned about it. The girl swings herself up onto her creature's back and does not catch fire.
It's at the door of a wooden building, and nobody else seems concerned either. It's probably just an illusion. He follows her out, but keeps a little distance from the horse just in case.
They trot at a sedate pace down the street and at the door she gets off her horse, pets its firey mane affectionately, and puts it away to lead him inside. It is a clothes store. It sells clothes. "Most places will take barter, especially if you found gold or something. I don't know about this one in particular but the mart across the street definitely does if you need to make an exchange."
Rashek looks around at the clothes. He'll have no chance at following current styles for obvious reasons, but since the goal is just to be obviously human that shouldn't matter.
"You might not have as much luck on that, but if you're willing to get something cheap, maybe." She points at a rack of something that is presumably cheap; Rashek obviously can't read the labels.