You can choose to have one pokemon (cannot be legendary) who will obey you for an entire day but then vanishes into thin air never to be seen again. What would you do and how would it effect you for the rest of your life?

I'd have an abra who would teleport me into vaults so I can steal as much money as possible, maybe even priceless artifacts, anything that I could flip to make a ton of money.

Or I'd make a youtube video doing insane shit in the wilderness with a salamence or something just so I can read youtube comments calling it fake and the various ways I used to make these seemingly high level effects eventhough I'm using a shitty cam. It would go viral.