You can't. Once they're released, they're gone forever.
on Pokemon pearl you only see 1
yes
No. Just like in Pokemon Pearl with the Pal Park you can only trade from Pokemon pearl to black, not back
Sorry, but you can't. You can trade from LeafGreen to Pearl, but not back.
Go to the PC Box and click on the Pokemon you want to release. Then click release. It should be there.
You need to get the National Pokedex. Then use Poke Transfer. But you don't get the White Pokemon on Pearl. You can never get the Pearl Pokemon back to Pearl.
you use pal park to get emerald Pokemon to pearl bur you can't transfer them back to emerald
You can release it while holding it in the p.c. box.
There will be Pokemon Platinum, but I am not sure of the release date.
Put the Pokemon you dont want in your PC. Press A on it and go down and press A on "Release". This will send the Pokemon back into the wild. You will probably never see that Pokemon again, so make sure you really want to release it before you really do it.NOTE: There is NO WAYto get back a Pokemon you released.
Unfortunately no
You can give them a revive that will give the Pokemon half of the hp it has back.