UnbanService it's a best way to get your game account unbanned for almost all online games. Sephirofl is a highly regarded unbanner, who has been conducting his service, on multiple sites, since June 2011.
Pokemon Go game supported too.
Type of bans supported:
- Use of bots and other 3rd party software
- Auction House economy exploiting
- Harassment or foul language
- In-game gold transactions involving real-life currency
- Use of exploits or “clever use of game mechanics” to trivialize different game mechanics
More information on service page - UnbanService