Phanpy can't learn earthquake. Only donphan can. I'd say donphan can learn it between lv. 50-60.
Phanpy does not learn Earthquake by leveling up, however its evolution Donphan can learn the move at level 46.
No, Groudon does not learn Earth Power in Pokemon Mystery Dungeon: Explorers of Time. Groudon's movepool in the game consists of moves like Earthquake, Fire Blast, and Solarbeam.
Yes, there are decent Pokemon that can't learn earthquake. Each Pokemon has its own strengths and weaknesses.
It doesn't learn Earthquake through level up, but it can learn it through the use of the Earthquake TM.
You have to use the TM10 to get earthquake. Venasuar doesn't learn it on its own
Some Pokemon in Pokemon Emerald that can learn Earthquake through leveling up include Groudon, Swampert, Flygon, and Claydol. There are also TMs available in the game that can teach Earthquake to a wider range of Pokemon.
Yes
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Charmander, Cyndiqual can learn smokescreen
The Pokemon Aggron is the final evolution of the Pokemon Lairon, which evolves at level 42. It is not able to learn the move Earthquake through leveling, but it can be taught Earthquake using TM26 at any time.
I dont think it can learn it.
It can learn it via the TM but not by level.