You can't Just trade it with somebody and trade it back. It is easy
Gurdurr evolves by trading. I traded mine at lv. 49
Gurdurr doesn't evolve by a stone, it will only evolve when traded.
In order for Gurdurr to evolve, you have to trade it.
Gurdurr evolves into Conkeldurr when it is traded to another player.
There is no legitimate way to evolve it without trading.
you evolve gurdurr by trading
You can only evolve Gurdurr by trading it with someone
Gurdurr evolves by trading. I traded mine at lv. 49
You evolve Gurdurr into Conkeldurr by trading it, like a Machoke into Machamp or Kadabra into Alakazam.
you must trade gurdurr for it to evolve
Gurdurr doesn't evolve by a stone, it will only evolve when traded.
In order for Gurdurr to evolve, you have to trade it.
I am pretty certain the Gurdurr evolves by trading, just like Graveler and Machoke Hope this helps :)
Gurdurr evolves into Conkeldurr when it is traded to another player.
trade it
There is no legitimate way to evolve it without trading.
Gurdurr does not evolve into Conkledurr via leveling up, instead, Gurdurr must be traded.