>>24560551>tattooed with the serial code 063-K17-1782 with a red R overlaid on itThe red R means Team Rocket, a group of criminals. Some believed it was disbanded, but I always knew they would pop up again eventually. The safest thing for you to do is just release the poor thing. Since it's a experiment from Team Rocket who know what she can do, maybe she can even spit fire, use water moves, or freeze things. She can hurt you pretty badly.
But if you became attached you will need patience, don't do anything pushy. It may take days, but you need to make her trust you, give her some rare candy, find what's her favorite berry is, buy some sodapop, or cook something yourself like a puff. Find something too to making her comfortable while she's trying to sleep, like a teddiursa doll or something like this. Once she trust you, you can "catch" her with a pokéball and take her to pokémon center. Watch out in the way, Team Rocket might want their pokémon back, go with someone capable of fight. Once you are in pokémon center stay with her the whole time while she's examined. I'm pretty sure they can help, most pokémon centers have specialists to help pokémon who suffered all kinds of abuse.