Info on the move Horn Drill

Horn Drill

Move data

Type	normal
Category	Physical
Power	0
Accuracy	30
PP	5
Introduced	Generation 1

If it hits, Horn Drill is guaranteed to make the opponent faint. Its accuracy increases if the user is a higher level than the target Pokémon, but fails if the target is higher level.

Its accuracy (as a percentage) is calculated as below, ignoring all other accuracy and evasion modifiers:

This means that if the user and target Pokémon are the same level, Horn Drill has 30% accuracy.

When a Pokémon is holding Normalium Z and uses its Z-Power, Horn Drill turns into Breakneck Blitz and has base power 180.

Game descriptions

Gold Silver Crystal	A one-hit KO, drill attack.
Ruby Sapphire Emerald	A one-hit KO attack that uses a horn like a drill.
FireRed LeafGreen	The horn is rotated like a drill to ram. The foe will faint if it hits.
Diamond Pearl Platinum HeartGold SoulSilver	The foe is stabbed with a horn rotating like a drill. The foe instantly faints if it hits.
Black White Black 2 White 2	The user stabs the target with a horn that rotates like a drill. If it hits, the target faints instantly.
X Y O.Ruby A.Sapphire	The user stabs the target with a horn that rotates like a drill. The target faints instantly if this attack hits.
Sun Moon Ultra Sun Ultra Moon L.G. Pikachu L.G. Eevee	The user stabs the target with a horn that rotates like a drill. The target faints instantly if this attack hits.
Sword Shield B.Diamond S.Pearl	The user stabs the target with a horn that rotates like a drill. The target faints instantly if this attack hits.