go to the ruin of alpha and go to the temple near the top solve th puzzle then you fall in and all the unknow start appering
You can't find Mew in Pokémon Silver.
Unknown(sorry about my spelling) Letter A is the rarest Unknown in all games. You are more likely to find a shiny Pokemon then Unknown A but if you are dedicated then go for it but prepare for frustration.
You can only find Ledyba in Pokemon Silver and Soul Silver version.
you can find the ? and ! unknown'
cianwood city
find them
pokemon heart gold
In the Ice Path.
It can be caught at Route 2.
no they both have different names and Pokemon gold you can eaisly find a caterpie and you can find one gold caterpie=gold metapod=pink butter free and silver you can find a silver weedle=silver kakuna = some colored beedrill.
I don't know about silver but on Pokemon Gold you have to beat all the Kimono Girls.Was that helpful.
You'll need to trade for it from Pokemon Red, Blue, or Yellow.