TM25
tm25
Gyarados can only learn Thunder by TM25 TM25 can be found at Lake Valor if you surf into this hidden area. TM25 can also be bought at the Veilstone Department Store for $5500.
TM25 Is Thunder.
TM25 is Thunder
Thunder
You can buy it at the Goldenrod Department Store
Luxio can learn TM25- Thunder.
you can find it in lilycove department store as tm25
You get TM25 Thunder in the Power Plant in Pokemon Blue.
Icirrus city pokemart - cost 70000
You can buy Thunder from the Department Store in Goldenrod City. It's TM25, and $5500.