You go south of pallet town there should be a little island where cinnabar island was. The 8th gym leader should be there but he won't battle you.You need the 7th gym badge to battle him.The 7th gym is near the island.Beat the 7th gym leader.Talk to the 8th gym leader again and he's going to go back to the gym to what for you there in Viridian City.
Candice
snowpoint city
It is in Viridian City. After you have beten the 7th gym leader it is open
Cinnabar Island
ice
a city
Not enough info: which gym leader?
The name of the 7th city that has the 7th Pokémon Gym in it in the Sinnoh region is Snowpoint City.
candace the leader of snowpoint gym is the 7th leader
Blue, the last gym leader in kanto region
Blaine.
Beat the 7th gym leader which is near cinnabar island and talk to the 8th gym leader which is on cinnabar island and he is going to go back to the gym to wait for you to challenge him.
you go to the 7th gym leader (in the seafoam islands) and after yu beat him you go back to cinnabar island and blue will say you are ready to fight him p.s. the 7th gym leader is fire type
In the Kanto region, the sixth gym is in Saffron City. The gym leader is Sabrina.
After you beat the 7th gym leader.
there is none. You will be stuck in sinnoh region. just an advice, don't play hacks again.