There are no legal versions of Pokemon Crystal for anything other than Gamenoy Color. You cannot find a legal copy for Game Boy Advance.
No
The Gameboy Color does not play GBA games. Pokemon Crystal Version would work, but Leaf Green would not.
The download of PokŽmon crystal shards version for GBA can be done on the official website. An internet search will help get the PokŽmon website.
i have never heard of Pokemon platinum gba only ds!
Look for it in eBay or Amazon.
There is no GBA version of Gold Version, but there will be a DS version in March in the US.
Yes
after beating the game, insert the Pokemon leafgreen version for gameboy advanced in the GBA slot. You can then catch Pokemon from that version.
Gold, silver, and crystal all begin in Johto. This is true, however they are all GbC (gameboy color) games, and will not work on a phone's gba emulator.
No.
There is not a verstion of platinum for gba
No