Go on to chapter 5, and try to get to Sabrina and beat her
The Rainbow Badge
It's erika the grass type user. the badge is the rainbow badge
You can use the move strength in Pokémon to move boulders. You can use strength in FireRed after getting the rainbow badge.
The episode in which Ash gets the Rainbow Badge is called "Pokémon Scent-sation."
Erica in Celadon City.
At celadon city.
The boulder badge, the cascade badge, the thunder badge, the rainbow badge, the soul badge, the marsh badge, the volcano badge and the earth badge.
You need the rainbow badge which you get a celadon city Hm cut is needed.
Heart Gold After getting the 8th badge go to Ecrutek City and fight the kimono girls in the dance studio. Once you beat them they will give you the rainbow badge. Soul Silver When in Kanto, go to Pewter City. The man standing on the raised surface will give you the rainbow wing.
The 8 badges for Pokemon Red are: Boulder Badge, (Brock) Cascade Badge, (Misty) Thunder Badge, (Lt. Surge) Rainbow Badge, (Erika) Marsh Badge, (Sabrina) Soul Badge, (Koga) Volcano Badge, (Blaine) and Earth Badge. (Giovanni)
It's in Celadon City and you obtain the Rainbow Badge.
You have to defeat Erika.