ムラっけ

“まいターン のうりょくの どれかが ぐーんと あがって どれかが さがる。”

maitaan nouryokuno dorekaga gu-nto agatte dorekaga sagaru.

After each turn, one of this Pokémon's stats at random rises two stages, and another falls one stage. If a stat is already at 6 or -6 stages, it will not be chosen to be increased or decreased, respectively.