Sherlock gets his first call from Bella's father asking for interpretation of a Pokémon the following morning. Charlie is on the line, but a Geodude can be heard muttering to itself in the background.
"Hullo," says Charlie. "Got a Geodude here who may've seen who spraypainted the public art on the bridge. I'll be able to start calling with more significant stuff if we can catch a few pettier criminals with 'mon testimony, but for now it's vandalism."
There is the faint sound of Charlie trying to explain to the Geodude how to hold the phone; she either figures it out or Charlie holds it for her, because she commences chattering away. "Duuuuuuuuude. Dude geodude ge-geodude."
"Oh, dear," says Sherlock. "You're right, that was terrible. Did you see who did it?"
"I see," he murmurs. For Charlie's sake, he translates, "She says he was taller than her trainer, and wearing a long brown leather coat with white stitching and a black hat with a large floppy brim and a red ribbon around it." And to the Geodude, "Anything else?"
"I'm sorry to hear that," says Sherlock. To Charlie, he explains, "When the vandal realized she was not part of the statue he released a Wingull and she was more soundly defeated than she has been since - when was that previous battle, if you don't mind my asking?"
"Before she was traded to her current owner. That must have been quite the Wingull."
"Dude," says the Geodude. "Duuuuuuuude."
"The Wingull was nicknameless, and it was after sunset by the length of a small nap."
"Are you done with Tiffany?" calls a girl's voice from the background.
"Dude?" agrees the Geodude, who is apparently called Tiffany.
"Think so. Sherlock?"
Then, "Yes. Thank you, Tiffany. You've been very helpful. I'm sure the police will be able to find the fellow who spraypainted you."
"Thanks," Charlie tells Sherlock again. "You want to be kept updated on how it goes?"
And then he goes looking for Bella. The library seems a reasonable place to start.
"I had the most fascinating call from your father just now. He wanted me to interview a Geodude named Tiffany about some vandalism she witnessed, and during the conversation she made reference to having been defeated by a Shaymin before she was traded to her current owner."