Does Regirock evolve?

No. Regirock has no evolutions.

What type is Regirock?

Regirock is a pure Rock type Pokémon.

Regirock is Rock. It takes 2× from Water, Grass, Fighting, Ground and Steel.

No. 0377 · Gen 3

Impish: Raises its best defense and drops Sp. Atk, which it won't use.

Hit REGIROCK with Water, Grass, Fighting, Ground and Steel for 2× damage.

2×Super effective

½×Not very effective

In Pokémon GO: Water deals 1.6× instead of 2×. GO chart

ImpishRaises its best defense and drops Sp. Atk, which it won't use.

Worked out from base stats. Your team may need something else.

Defeating Regirock gives 3 Defense EVs.

The strongest attacking move it can learn in each type, across all games. Not every game has every move. Same-type moves get a 1.5× bonus.

Type	Move	Kind	Power
Normal	Explosion	Physical	250
Fighting	Focus Punch	Physical	150
Electric	Zap Cannon	Special	120
Rock	Meteor Beamsame type	Special	120
Ground	Earthquake	Physical	100
Steel	Flash Cannon	Special	80
Fire	Fire Punch	Physical	75
Ice	Ice Punch	Physical	75

Regular Pokémon whose same-type moves hit it hard and who take little from its same-type moves. Picked from types and base stats only, not movesets.