After defeating the Pokemon league,Fly to the bottom of the Pokemon league and enter then walk to the left.
The Silver Cave is located in Mt. Silver in which you can go after you get all the Johto and Kanto badges. In the Silver Cave you can find lots of strong Pokemon and fight the final boss, Red at the top of the cave.
It will appear in Mt. Silver cave.
Silver cave in Pokemon Gold is located on route 28 on the way to Mt. Silver. The player will need Cut and Surf to navigate this passage.
you can go to the mt silver
You get sneasel in Route 28 silver cave (Night)
In Pokemon silver I think
Dark Cave
You can't get into cerullean cave(the cave with mewtwo in it) on Pokemon silver because according to the game's story, the cave has caved in, but there may still be some remmants of the cave you could get to via a gameshark.
You have to obtain all 16 badges, and then you can enter the building that leads to victory road to take a left to go into Silver Cave, a.k.a. Mt. Silver.
it is in cerulean cave
mewtwo
in front of diglett cave