In battle
Liquid Ooze causes HP-draining moves used on the Pokémon with this Ability to damage their user instead of healing them.
If a Pokémon with Liquid Ooze is hit by a draining move such as Giga Drain or Leech Life (including the status move Strength Sap), or takes damage from the effect of Leech Seed, the amount of HP that would be recovered by the opponent is dealt as damage instead (after applying the effect of Big Root). The damage dealt by the move is not affected. Prior to Generation V, Liquid Ooze did not affect Dream Eater.
Even if the user of the HP-draining move cannot heal from its effect due to having full HP or the effect of Heal Block, it will still take damage.
If the user of an HP-draining move were to faint due to Liquid Ooze on the same turn as the victim of the move, then the user faints before the victim. This means that the user's team loses the battle if both teams had their final Pokémon sent out.
If the recipient of Leech Seed's effect were to faint due to Liquid Ooze on the same turn as the victim of Leech Seed, then the victim faints before the recipient. This means that the victim's team loses the battle if both teams had their final Pokémon sent out.
Draining moves
The Ability affects the following moves:
It also affects the seeded status condition.
Outside of battle
Liquid Ooze has no effect outside of battle.