You can get Gyarados’ Mega Stone (Gyaradosite) by interacting with a Poochyena inside a fishing shack on Route 123. However, this is only accessible when you enter Route 123 through its northeast entrance from Route 122.
You’ll also need Pokémon in your party that know Cut and Surf to reach the fishing shack.
Gyaradosite Location (Step-by-Step)
When you first arrive at Route 123 through its entrance via Route 118, you’ll soon find out that ledges in the middle of the route prevent you from traveling to the eastern side.
This means we have to travel through Route 122 to get to where this Mega Stone is located.
As for prerequisites, just make sure you’ve first:
- Obtained the sixth Gym Badge from Winona, the Gym Leader from Fortree City
- Explored Route 120
- Brought a Pokémon with HM01 Cut
- Brought a Pokémon with HM03 Surf
If you’ve done all that, head over to Route 121 to get started.
Step 1: Start following the path heading east on Route 121.
Step 2: Head down the stairs turning south, and use the route’s south exit.
Step 3: Use Surf on Route 122.
Step 4: Follow the path heading south until Mt. Pyre’s entrance is visible.
Step 5: Disembark here going south to enter Route 123.
Step 6: Follow the path down and then turn to start heading west.
Step 7: Use HM01 Cut on the nearby tree here (right after the berry bushes). Then follow the narrow path up and heading west.
Step 8: Cut down another tree you’ll run into on the path. Then continue following the same narrow path towards the left.
Step 9: Head down the ledge moving left past the berry trees.
Step 10: Continue heading towards the west here.
If you time it right, you can walk past the Poké Fan without having to battle him.
Step 11: Once you reach the tall grass here, hop down one ledge and then continue heading west.
Step 12: Battle the Ace Trainer that’s in your way here. Then jump down two more ledges, still heading west.
Step 13: After jumping all the ledges you’ll be able to go inside the nearby fishing shack.
Step 14: Walk up to the Poochyena inside the shack, then interact with it to give it a little scratch and obtain the Gyaradosite.
How Does the Gyaradosite Work?
Mega Stones, like the Gyaradosite, are held items that allow certain Pokémon to Mega Evolve, granting them a massive boost to their base stats.
Some Pokémon also change types upon Mega Evolving.
Gyarados, after Mega Evolution, becomes a Water/Dark-type Pokémon.
Most Mega Evolutions also change the Pokémon’s ability, which lasts until the battle concludes. When Gyarados Mega Evolves into Mega Gyarados, it changes its ability to Mold Breaker, making the user’s moves and effects ignore other Pokémon’s abilities.
Mega Gyarados is a phenomenal Dragon Dance Sweeper.
Because of how bulky it is, you can easily find opportunities to set up a Dragon Dance or two. From there, you can attempt to sweep your opponent’s team with Mega Gyarados’ high base Attack. Dragon Dance’s Speed boost also makes up for its average base Speed.
Its new ability, Mold Breaker, complements Mega Gyarados’ role as a Dragon Dance Sweeper well.
Mold Breaker allows you to use Earthquake on Levitate users and ignore bulky Unaware users.
Tip: Let your Gyarados have the ability Intimidate before Mega Evolving. Intimidate lowers the opponent’s Attack stat by one stage when you enter a battle, making it safer to set up Dragon Dance against Physical attackers.