Overgrow

When Pokémon with this ability are at 1/3 HP or less, all of their Grass-type moves will have 50% more power.

Pokémon	Tier	Abilities	HP	Atk	Def	SpA	SpD	Spe	BST
Meganium	NU	Overgrow	80	82	100	83	100	80	525
Sceptile	UU	Overgrow	70	85	65	105	85	120	530
Torterra	UU	Overgrow	95	109	105	75	85	56	525
Venusaur	UU	Overgrow	80	82	83	100	100	80	525