It's really helped me with VGC style practice. Not when it comes to the AI's competency, but when it comes to figuring out what pokes I can 1HKO and what pokes I can't. Stuff like that. If I want to use a team I usually run it through the battle tower. If it can't break 120, it's no good.
Anybody else use it for actual practice?
Anybody else use it for actual practice?