You will find TM26 Earthquake on the highest floor within Relic Castle. This Castle is located in the northwest corner of Route 4, and you can reach it by trekking through the Desert Resort.
But before you can reach the top floor of Relic Castle, you must first defeat N and the Elite Four. So this TM is only accessible in the post-game of Black & White.
As for the move itself:
Earthquake is arguably one of the most powerful moves in the game. It boasts 100 base Power with perfect Accuracy. And it is one of the most common attacks used in competitive play due to its strength and consistency.
TM26 Earthquake Location (Step-by-Step)
Step 1: Starting at the Nimbasa City Pokémon Center, head east through the city.
Step 2: Keep walking east, passing the Battle Subway.
Step 3: At the east end of the city, exit south through the green tunnel.
Step 4: The tunnel’s exit leads to Route 4. From here, head south.
Step 5: Keep south on Route 4, passing the hiking trainer.
Step 6: Above Route 4 is an overpass. Keep south going under the overpass, and turn left onto the adjacent road.
Step 7: Head west on the road, passing the traffic cones.
Step 8: Turn and start going north at the corner of the road, passing the vending machine to the side.
Step 9: Keep moving north through the other side of the overpass and head onto the sand path.
Step 10: Stay north through this sandy area.
Step 11: Take your first available left turn on the sand path.
Step 12: Continue west on this path, going past the Doubles trainers.
Step 13: At the far west end of the path is a tunnel that leads to the Desert Resort. Walk through the tunnel.
Step 14: Now at the Desert Resort, head north past the two NPCs.
Step 15: Continue north across the sand dunes past the hiking NPCs.
Step 16: Veer northwest through the sand, passing the NPC with sunglasses.
Step 17: The Relic Castle entrance is directly ahead, surrounded by statues.
Once you see it just enter the Castle.
Step 18: Upon entering the Relic Castle, walk west past the first sand trap.
Be sure to pass by the sand trap far away from the center, otherwise you’ll fall through.
Step 19: Walk slowly above the next sand trap and then veer south.
Step 20: Directly south of this trap is a staircase.
Climb the stairs down to reach the lower floor.
Step 21: On this floor, head east from the bottom of the stairs.
Then sink through the sand trap directly ahead.
Step 22: After sinking through to the lower floor, head west past the sand trap ahead.
Step 23: After passing the sand trap, turn south.
Step 24: Just ahead is another sand trap.
Sink through this sand trap to fall down to the lower floor.
Step 25: Now on the lower floor, walk west past the next sand trap.
Step 26: Next to that trap is a narrow passage in-between two walls.
Carefully walk through this passage (avoiding the first sand trap) and sink through the 2nd sand trap straight ahead.
Step 27: After sinking through to the lower floor, walk into the sand trap you’ll see straight ahead.
Step 28: Now on the basement floor of the Relic Castle, head north over the hilly dunes to the right.
Step 29: At the top of the dunes is a doorway.
Enter through this door to reach the Castle’s chambers.
Step 30: Once you’re inside the chambers, head north on the path. Then climb down the stairs at the end of the path.
Step 31: Head through the doorway at the bottom of the stairs.
Step 32: The doorway leads to a much smaller room.
Enter the door straight ahead on the western wall.
Step 33: The next room will have one fallen column.
Here, continue straight through the door ahead (again on the western wall).
Step 34: Now in the next room, take the door on the western wall yet again.
Step 35: The next room will look exactly the same, but rest assured this is the right way.
Continue the pattern and take the door ahead on the western wall.
Step 36: The next room will have four standing columns.
Just take the same door ahead on the western wall.
Step 37: That last door finally leads us out of the maze.
From here, climb the staircase to your left.
Step 38: From the top of the stairs, veer north and follow the hallway going up.
Step 39: Directly ahead is a doorway. Enter through to the next room.
Step 40: In the next room is a lone staircase.
Take these stairs up to the next floor.
Step 41: The next room also features a staircase. Continue climbing to the upper floor.
Step 42: Following the same pattern, climb the stairs located in this room to reach the next floor.
Step 43: And then take the upper staircase in the next room as well.
Step 44: Continue your climb and take the next set of stairs to the upper floor. Just one more to go!
Step 45: Finally, climb the final set of stairs up to the highest floor.
Step 46: TM26 Earthquake is located on the ground here, the highest floor in Relic Castle.
Earthquake Details + Uses
|Earthquake Move Details|
Largely considered to be the most powerful Physical attack in mostly ever Pokémon game, Earthquake is worth the hype.
This Ground-type move features:
- A base Power of 100
- Perfect Accuracy
- And the move can be learned by many different types, not just Ground-type Pokémon
But like all Ground-type moves, Earthquake won’t affect Flying types. And it will not hit Pokémon with the ability Levitate.
When used by a Ground-type Pokémon, Earthquake’s 100 base Power is boosted to 150 thanks to STAB (Same-type attack bonus).
Who To Teach Earthquake To
If you’re looking for recommendations for which Pokémon to teach Earthquake to in Black & White:
The are several great Ground-type Physical attackers you could choose from, such as Rhyperior, Excadrill, Mamoswine, and Golurk.
Every Pokémon named above learns Earthquake via level-up, though.
So you won’t need to go through the effort to grab TM26 unless you plan to teach it to a non-Ground-type.
Many of Black & White’s hardest hitters such as Rampardos, Haxorus, and Conkeldurr can learn the move via TM.