>>15838038A Torterra with Protect/Stockpile/Leech Seed/Earthquake. It used Leech Seed and protected every second turn against Kangaskhan without fail, using Stockpile on the turns it didn't.
I thought Kangaskhan might be fine as long as I got Power Up Punch in every two turns, but that was a mistake. Earthquake was unable to do enough damage to KO it, and Sucker Punch couldn't be used. (If I'd been using Return rather than Earthquake, Kangaskhan would've beaten it however)
With the Stockpiles up, Blaziken was unable to finish it off on it's own, and Garchomp became locked into a dragon move. The CPU's next poke was an Empoleon with Blizzard so that was that.
Worth noting: the battles become EASIER following Round 50, and Legendaries no longer appear as they often did in the 40s.
