yes there is lapras in union cave, and mewtwo near cerulean city. and that's all i know(editor added the mewtwoXD)
You cannot make a secret base in Pokemon soul silver.
You cannot make a secret base in Pokemon soul silver.
Secret Potion
to get the secret potion(medicine)you need to go to cianwood
there is absolutely no secret apricorn in heart gold or soul silver, but good question.
it takes you back in time
Action Replay or Gameshark? You can look it up on SuperCheats.com
sorry you have to trade it to Pokemon soul silver
Soul silver is AWESOMENESS!! yes GET IT
secret potion which you get by surfing to cianwood starting from the beach in olivine
You get the HM Whirlpool from Lance after you infiltrate Team Rocket's Secret Base in Mahogony Town.
According to Serebii.net there are 493 Pokemon in Soul Silver.