You can't its not a move in emerald.
You obtain Flash Cannon after defeating the 7th Gym Leader, Byron in Canalave City.
you have to teach it to them
You cannot. Flash Cannon was not introduced until Generation IV, and Fire Red is a Generation III game...and a Generation I game.
There isn't a TM for Hydro Cannon. You water Pokemon learn it from a guy in the desert at route 228. His house will be by a pond. Go in and talk to him and he will teach your Pokemon Hydro Cannon (water types only). Note: You have to be well bonded with your Pokemon before he will teach it.
You can't its not a move in emerald.
You obtain Flash Cannon after defeating the 7th Gym Leader, Byron in Canalave City.
No don't teach it because it learns some great moves but it depends what level it is not only that, but aura sphere is a supremely better move. it can take anything that flash cannon can and more. ice, rock, steel, normal--all aura sphere. I'm afraid i don't see the need.
you have to teach it to them
You cannot. Flash Cannon was not introduced until Generation IV, and Fire Red is a Generation III game...and a Generation I game.
There isn't a TM for Hydro Cannon. You water Pokemon learn it from a guy in the desert at route 228. His house will be by a pond. Go in and talk to him and he will teach your Pokemon Hydro Cannon (water types only). Note: You have to be well bonded with your Pokemon before he will teach it.
there really is no Pokemon that know flash naturally but you can teach it to a Pokemon
By Level:Ferroseed L52Ferrothorn L61By TM91:RoggenrolaBoldoreGigalithSigilyphSolosisDuosionReuniclusVaniliteVanillishVanilluxeFerroseedFerrothornKlinkKlangKlinklangEeletrikEelektrossCryogonalDruddigonGolurkDurantHyddreigonCobalionThundurusZekromKyuremGenesect
TM91 can be found in twist mountain
teach a Pokemon the hm move flash
Teach one of your pokemon 'flash' using a TM/HM
There is a house on route 228 and there is an elder that will teach Pokemon "special" moves to "special" Pokemon he has a note on wall which Pokemon can learn those moves.