No
Slaking Hariyama Manectric Furret Ledian Ampharos Hitmontop Noctowl Kingdra Gyarados Scizor That's all the Pokemon you cannot catch
You can catch red Gyarados anywhere because red Gyarados are only shiny but are extremely rare.
train it
In Pokemon Crystal version, you catch it at the Lake of Rage.
To get a red Gyarados in Pokemon LeafGreen you first need to catch a shiny Magikarp. This shiny Magikarp will be able to evolve into a red Gyarados. This is due to the red Gyarados simply being the shiny color of Gyarados.
no but its spelt gyarados lol
GYARADOS
Catch a shiny magikarp and evolve it.
A red gyarados is a shiny gyarados (however, the Pokemon Company did not call them shiny untill the Unova Region). You can find it wherever you can find a normal gyarados, but your chances to find it are very slim.
all of them
there all over sinnoh just weaken and catch.
You need a super rod or the Pokemon modifier code on your Action Replay