It doesn't learn Earthquake through level up, but it can learn it through the use of the Earthquake TM.
Dig is a TM, so you can teach it to it at any level.
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
There is no such move as "Shield Protection." Perhaps you meant Protect, which Graveler is able to learn by TM.
all i know is geodude, graveler, golem, and sceptile. improve if you know more
grave;er learns rock tomp earthquake rockblast exlosion and more
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.
You must evolve it into a graveler. It learns it at level 34
Dig is a TM, so you can teach it to it at any level.
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.