As far as i know Debug Mode allows you to edit both EVs and IVs. You can find it in Aironfaar's Mod Box thread. It may mess up your game so use it cautiously.
And if you want to train your pokemon via legitimate means i suggest using power items. You can buy them on the 4th floor in Obsidia Department Store. I can additionally trade you a mon with pokerus to speed up EV training.