|1||Power Plant – Far southeast corner inside the building||No|
You will find TM25 Thunder in the far southeast corner of the Power Plant. You’ll be able to reach the Power Plant by surfing south on the river on Route 10 (you’ll need to surf just past the Rock Tunnel entrance).
Cut is needed to reach Route 9 & Route 10, while Surf is necessary to cross the water leading to the Plant.
TM25 Thunder Location (Step-by-Step)
Step 1: Starting at the Cerulean City Pokémon Center head west and follow the path up through the city.
Step 2: Veer up and head east through the city, passing the two small houses.
Step 3: You’ll find another house at the end of this path to the east that’s guarded by a police officer. Enter the house.
Step 4: Now inside the house, head through the hole in the back wall.
Step 5: Now outside of the house, follow the path to the right and head down.
Step 6: Ahead to the east is a gap in the fence.
Follow the path through the gap to reach a small cuttable tree.
Step 7: Use HM01 Cut to remove the tree. Then keep heading east to head onto Route 9.
Step 8: Once you’re past the tree, veer south in front of the trainer and hop over just 1 ledge.
Step 9: After hopping over the ledge, head east on Route 9.
Step 10: Continue walking east, following the path towards the right.
Step 11: Just ahead, Route 9 will open up to the north. Begin walking north past the bug catcher and follow the path around.
Step 12: Hop over the ledge ahead (just 1 ledge) and then continue going east on Route 9.
Step 13: You’ll soon spot a body of water ahead behind a picket fence just as you get closer to Route 10.
Use HM03 Surf on the water.
Step 14: Follow the body of water towards the right, then veer south to travel down the river into Route 10.
Step 15: As the water path ends, hop onto the land on your left side.
Step 16: Head northwest past the scientist NPC and enter the Power Plant.
Step 17: Now inside the Power Plant, head north.
Step 18: Continue north through the plant, passing through into the next room.
Step 19: Walk into the next room towards the east.
Step 20: After reaching the next room, head south and keep going down into another room.
Step 21: After entering the next room you’ll see a split in the path (going left or right).
Head towards the right and follow this passageway.
Step 22: Continue on the path going right, passing in-between the rocks.
Step 23: Ahead to the south is another room with some yellow barrels. Walk through it, heading southeast.
Step 24: TM25 Thunder will be on the ground in the far southeast corner of this room.
TM25 Thunder Details + Uses
|Thunder Move Details|
If it weren’t for Thunder’s poor Accuracy of 70%, it’d be hard to argue against it as the most powerful move in FireRed & LeafGreen.
The attack has a dominating base Power of 120, and a whopping 30% chance of paralyzing its target.
This move’s accuracy is really its Achilles heel.
Although there is a way to fix Thunder’s poor Accuracy.
When you use Thunder in rainy conditions, the attack’s Accuracy is boosted to 100%.
So it would be ideal to pair both Rain Dance and Thunder together in a Pokémon’s moveset. That way rainy conditions could be created easily and help you consistently land each Thunder attack.
There are a few Pokémon that can be taught both Thunder and Rain Dance in FRLG. Some of the better options include Starmie, Gyarados, Lapras, and Dragonite.
As a Special move, Thunder’s potential Power is largely dependent on the user’s Special Attack stat. So if you’re looking to get the best bang for your buck, teach TM25 to a Pokémon like Magneton.
Other Electric-types in FireRed & LeafGreen with great Special Attack stats can just learn Thunder via level-up, such as Jolteon, Zapdos, and Ampharos.