Grudge

ghost status

If the user faints this turn, the PP of the move that fainted it drops to 0.

Stats

PowerNone (status move)
AccuracyNever misses
PP5
Priority0
Categorystatus
Targetuser
IntroducedGeneration III

In game description

If the user faints, the user’s grudge fully depletes the PP of the opponent’s move that knocked it out.

Pokemon that learn Grudge

Showing the first 18. Availability varies by server, since some restrict move tutors or TMs.

Using Grudge in Cobblemon

Grudge deals no damage, so its value is entirely in what it sets up. Status moves are usually the difference in a close gym fight, and sleep or paralysis also make a wild Pokemon far easier to catch.

Check the type chart before relying on it, and look up specific targets in the Pokedex where dual-type multipliers are already worked out.