you cannot catch it, you have to give an eevee a waterstone. To get an eevee, either trade for one in hearthome city or catch one in the mansion's garden after you get the national dex
route 214
Vaporeon does not naturally appear in the wild in Pokémon FireRed, so you cannot catch them from the wild. However, you can obtain a vaporeon by using a Water Stone on an eevee.
Eevee evolves into Vaporeon with the water stone, and that's it. Vaporeon is Eevee's last evolution, only 1 of 7 eevee evolutions.
you cant
a collector on route 212 named Douglas has a jolteon flareon and a vaporeon hope this helped : )
you cant just catch a vaporeon unless you Pokemon modify or cheat. the only way to get vaporeon is to get an eevee and use a water stone on it.
Actually you can breed a Vaporeon with a Ditto. It will just take some time for an Egg to come out.
On route 214, There is a trainer with a Jolteon, Flareon and a Vaporeon. The trainers name is collector Douglas
there is a trainer on the route 114 who has a vaporeon
you would have to give eevee a water stone for it to evolve
At lv. 36
Vaporeon.