GM Post
"I'm sorry but I can't give out ID cards." Roark explained, "They are distributed at Pokemon Centers. If you go there, they will give you a form to fill out. Then you gotta show them some other form of identification like a drivers license, welfare card or a school ID. Then once they verify it is legitimate, they will issue you a card."

Roark continued.

"The free accommodation is meant for trainers, but unfortunately they get a lot of people applying for Trainer Cards who are runaways or homeless, who just intend on sleeping full time at a Pokemon Center, hence why they are so strict on giving them out."