Cubchoo

“When it is not feeling well, its mucus gets watery and the power of its Ice-type moves decreases.”

— Pokémon Black

“Its nose is always running. It sniffs the snot back up because the mucus provides the raw material for its moves.”

— Pokémon White

“Their snot is a barometer of health. When healthy, their snot is sticky and the power of their ice moves increases.”

— Pokémon Black 2