If Dhelmise does "Giga Drain" and the Defending Pokemon only has 10 HP left, does Dhelmise still heal itself for 30 damage?
Yes, because the 30 damage is still done, even though it is more than enough to KO the Defending Pokemon.
Giga Drain

Other known variants




x2
-20Overgrow
As long as Turtwig GL's remaining HP is 60 or less, each of Turtwig GL's attacks does 30 more damage to the Defending Pokémon (before applying Weakness and Resistance).


Giga DrainAfter your attack, remove from Turtwig GL the number of damage counters equal to the damage you did to the Defending Pokémon.
If Dhelmise does "Giga Drain" and the Defending Pokemon only has 10 HP left, does Dhelmise still heal itself for 30 damage?
Yes, because the 30 damage is still done, even though it is more than enough to KO the Defending Pokemon.