SoulSilver
You can get Earthquake in the Victory Road or in the Battle Frontier in exchange for BP. Click here for a video that shows how to get to Earthquake in the Victory Road.
Requirements
- HM Strength
- Repel (optional, but convenient)
Pearl
TM Earthquake can be found by going into the secret entrance for Wayward Cave, which is under the Cycling Road. You can also buy it in the Battle Park in exchange for BP. Click here for a video which shows how to get it in Wayward Cave.
Requirements
- HM Strength
- Bicycle
- Repel (optional but convenient)