Sorry don't have Pokemon Silver.
And i am pretty sure there are only 8 gym leaders.
Update: There are technically 16 gym leaders. Once you beat the main 8 in Johto, you're allowed to go to Kanto to defeat the Elite Four -- while you're there, you can access 8 bonus gym leaders to get the 8 Kanto badges.
However, there still aren't 13 gym leaders in total.
You get 3 more.
2 Pokemon a pidgey(lv.9) and pidgeotto(lv.13)
Go To That Island In Kanto That Deserted One When You Have Got 13 Badges And Talk The Guy Up The Stairs From The Pokemon Centre Hes Blue The Final Gym Leader He Goes To The Last Gym Since Giovanni Had Dissapeared Then Challenge Blue.
Falkner is the first gym leader in the Johto region. He uses a Lvl 9 pidgey and a Lvl 13 Pidgeotto, so he's not as much of a pushover as he was in G/S/C.
gym 1: flying gym 2: bug gym 3: normal gym 4: ghost gym 5: fighting gym 6:steel gym 7:ice gym 8:dragon after beating the elite four and champion you battle the kanto gyms gym 9: electric gym 10:psychic gym 11: grass gym 12: water gym 13: poison gym 14: rock gym 15: fire gym 16: mix
You go the the Seafoam Islands and you'll find that Blaine, the 13th gym leader, has made a gym inside a cave since there was an eruption in Cinnabar Island.
I don't think there is a cave under cycling road in Pokemon heart gold or soul silver, are you sure you have the right name in your question? If you do mean heart gold, the next thing to do after going through cycling road is to go into fuchsia city, beat the gym leader, explore Pal Park, and take route 15, 14, 13, and 12 up to Lavender Town. Good luck!
That's easy. You can find it in Kanto in Routes 13, 14, and 15.
It learns Water Gun at level 13.
Qwilfish is rarely found in Routes 12, 13, and 32
Johto #1: Violet City Gym #2: Azalea Town Gym #3: Goldenrod City Gym #4: Ecruteak City Gym #5: Cianwood City Gym #6: Olivine City Gym #7: Mahogany Town Gym #8: Blackthorn City Gym Kanto #9: Vermillion City Gym #10: Saffron City Gym #11: Celadon City Gym #12: Fuschia City Gym #13: Cerulean City Gym #14: Pewter City Gym #15: Cinnabar Island Gym #16: Viridian City Gym
any