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Liquid Ooze (Japanese: ヘドロえき Oozing Liquid) is an ability introduced in Generation III that mandates HP draining causes injury. In effect, if the user's HP is drained by a move like Leech Life or Giga Drain, the amount of HP that should be recovered by the move's user will in fact be dealt as damage. However, the Pokémon with Liquid Ooze will still be damaged. Four Pokémon have this ability, all of the Poison type.

Pokémon with Liquid Ooze

Single ability

No Pokémon have Liquid Ooze as their only ability.

Dual ability

Tentacool	Tentacruel	Gulpin	Swalot
Clear Body	Clear Body	Sticky Hold	Sticky Hold