Assuming you are playing Pearl, Diamond, Platinum, HeartGold or SoulSilver, it won't learn it via leveling up, you must use the valuable TM26; but it is a good choice of Pokemon to use it on.
You can get the TM from Wayward Cave, and some other places, which I can't be bothered to list right now, I'm currently underground trying to find Heart Scales in Pokemon Pearl.
HEART SCALES FTW!!!!
It doesn't learn Earthquake through level up, but it can learn it through the use of the Earthquake TM.
Aggron can learn earthquake by using the TM on it.
Grotle is not able to learn the move Earthquake by leveling or by TMs. It's evolved form Torterra is able to learn Earthquake at level 32.
Level 54 :D
only if gible gets along with you.
Venusaur can only learn Earthquake through TM26 Earthquake.
It doesn't learn Earthquake through level up, but it can learn it through the use of the Earthquake TM.
Metagross can only learn Earthquake with the use of a TM.
Aggron can learn earthquake by using the TM on it.
Camerupt learns Earthquake at level 49.
Grotle is not able to learn the move Earthquake by leveling or by TMs. It's evolved form Torterra is able to learn Earthquake at level 32.
Pupitar can learn Earthquake at level 50. Alternatively, it can also learn Earthquake through TM26 in some Pokémon games.
Rhyhorn will learn earthquake at level 52. However, if you evolved it at level 42 into Rhydorn you will have to wait 6 levels later than normal to learn earthquake.
he dont learn it
Level 32.
Gligar can't learn erthquake if you want him to learn erthquake you need to go find the Tm
gible evoles at level 34