Trade evolution GTS glitch
This glitch allows you to evolve trade evolution Pokémon without actually trading them.
Notes
It's best if you request a Pokemon that is impossible to get in exchange for your Pokémon. This way, no one will take it.
Requirements
Access to the Global Trade Center and a Pokémon your willing to trade.
Procedure
1. Go to the Global Trade Center.
2. Deposit the Pokémon into the Global Trade Center that you want to evolve. If the Pokémon requires an item to evolve, have the item equipped before you deposit your Pokémon.
3. Search the Global Trade Center for any Pokémon, and do at least one trade.
4. Withdraw your Pokémon from the Global Trade Center.
5. It will enter the "evolving" screen and you will now have evolved your Pokémon.