>>53582671As long as it is something they just "shed" off and is not painful to take, I guess they would be okay with it as long as it just a bit at a time? At most I could see them selling their own stuff rather than giving it away.
>>53582691There's a list here + the Appletun line, but I don't think the guild has any of these aside from the Skiddo and Booker.
https://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9mon_food#Food_produced_by_Pok.C3.A9monOne other possibility I thought would be to take their leaves to make tea.