"Aack! You made me lose a Poliwag! What are you going to do about it?"
"Just forget about it."
After being defeated
"Well, that was a very interesting battle now, wasn't it? When I'm fishing here, I sometimes catch items that people have dropped. If I find anything, I'll give it to you. Will you give me your phone number?"
No: "All right... Come back if you have a change of heart."
Yes: "If I snag anything good, I'll be sure to let you know."
In the manga
In the Pokémon Adventures manga
Wilton is Yellow's uncle ("pal" in the VIZ translation).
Wilton was the one who taught Yellow how to fish, and gave Yellow her second Pokémon, Dody.
In Teddiursa's Picnic on Route 32, where he met Gold, who asked if he had seen a Poké Ball containing a Poliwag. Wilton informed Gold that a thief had been stealing Pokémon right out of local Trainers' hands. Gold used his billiards cue to hit the thief in the jaw with a Poké Ball, causing it to fall into the water, and revealing that it was in fact a Granbull. They realized that it had been stealing all the Poké Balls for attention, in order to get help for its jaw, which had conveniently been fixed by Gold's shot. After it gave them back the Poké Balls it had stolen, including Polibo's, Wilton gave Gold his Pokégear number. Gold then left, and Wilton compared Yellow's fishing skills to Gold’s skill with billiards.