Lol, well, I just ran stall over Wi-Fi yesterday and the battle only lasted like, an hour. Wouldn't have even been that long, but my Gatr missed an Ice Punch in through Sand Veil and then it hit me with a Crit Stone Edge, lol. So yeah, it took another at least 20 minutes after that. It isn't so bad as long as you know how to use it (As in, get your hazards up early), and don't just keep switching between walls with no hazards.
Is that even possible.............