It's in mahogany town but you have to beat team rocket in the house that has a tree with a antanae on it then the guy blocking the door to the gym will be gone.
the seventh gym leader is in the island where articuno was in and still is
You battle the 8th gym leader, Clair, at Blackthorn City.
The final GYM Leader in Pokemon Silver (Game Boy Color) is in Blackthorn City. Her name is Clair and she uses Dragon type pokemans.
once you walk in you just go up the ladder directly in front of you
the seventh gym leader is in Foam Island to the right of where blue is(on the map) ,(where he tells you to get the seventh gym badge) the seventh gym leader uses fire type Pokemon so having Suicune, Lugia, and Snorlax is an advantage.(snoralax can use water moves too... i don't know why cuz he's not even water type...) the eighth gym leader has very strong Pokemon so level your Pokemon alot. Note: Blue is so strong he killed my level 70 ho-oh...
there will be a secret door at olivines lighthouse and it will take you to jasmine then go back to the gym then jasmine will battle you
blackhorn city i think its next to mahogany town
The fourth gym leader in Pokemon Soul Silver is in Ecruteak City.
Blaine. Seafoam Island (Cinnabar)
Chuck, the fighting-type gym leader, is located in Cianwood City, south of Olivine City. You'll need Surf to reach the town, though.
get a Pokemon with a ressisstance
The move deleter in Pokemon silver is located in Blackthorn City.