I think I may give this a go later on, You can't exactly level block a gym leader though..
How do you not level grind though? If you're not strong enough to say beat brock by the time you first get to him, You try, You fail, Rinse and rpeat until you're strong enough.. that in a way is grinding?
Also surely if you can use one pokemon to beat an entire gym, It's going to start getting easy as soon the 'leader' pokemon will be far superior..
My foot may slip and hit the spacebar which may accidentally toggle speed..