you must beat all other gym leaders
Head back to Viridian City and challenge the gym there (it will be open now) to get your 8th badge. After that come the Pokemon league.
To get the 8th Gym Leader to return to his Gym in Viridian City, you must defeat all 7 other Gym Leaders.
Blue (The eighth gym leader) is waiting on Cinnabar. He won't battle you unless you've beat the rest of the gym leaders
The Unova gym leaders are; !st gym: Cilen, Chili, and Cress 2nd gym: Lenova 3rd gym: Burgh 4th gym: Elesa 5th gym: Clay 6th gym: Skyla 7th gym: Brycen 8th gym: Drayden(pokemon black) and Iris(pokemon white)
Giovanni
Go to the 8th gym leaders house with a dragon type
you must beat all other gym leaders
he is in viridian city and also he the leader of team rocket
i think you need to beat all the gym leaders first.
Dugtrio, Rhydon, Nidoking, Nidoqueen, Rhyhorn.
You have to beat all of the other gyms otherwise it's impossible.
It is not possible to reverse the order of Gym Leaders in Pokemon Pearl. This is due to how the story of the game is written. And the fact that the 8th Gym Leader will be impossible to beat at the start of the game.
the gym leaders are the original 8 leaders from kanto. 1st rock type 2nd water 3rd electric 4th grass 5th poison 6th psychic 7th fire 8th ground
Head back to Viridian City and challenge the gym there (it will be open now) to get your 8th badge. After that come the Pokemon league.
The 8th gym in Pokemon Yellow is situated in Viridian City. It is the second city you encounter when you first begin your game.
To get the 8th Gym Leader to return to his Gym in Viridian City, you must defeat all 7 other Gym Leaders.