there is no mushroom island.
You can't get to Four Island in Pokemon Red Version.
Cinnabar Island
island 7.you have to get a special s.s.ticket from somewhere.
talk to Celio on One Island
I'm not sure why there is no 4 island, but you can get a better version at Target or GameStop!
You take it to the Pokemon Lab on Cinnabar Island, a scientist there will make it into a Aerodactyl.
treasure island has no end its just a small island with alot of hidden items on it.
you cannot rent any Pokemon in red version
Its under the rock by Proffesor Oaks house
The Pokemon Mansion on Cinnibar Island, and after you beat the Elite Four, Mt. Ember of the Sevvii Islands.
rock smash isn't in Pokemon red version
Give the rubies to Ceile on 1 island then he will give you a pass to acess 4-7 island where you can breed and capture legendary pokemon.