You can get Mewtwo, the legendary birds, one of the legendary dogs depending on your starter Pokemon and the event Pokemon which are Deoxys and Mew but you must mix records with someone who participated in the Nintendo events to get these.
No, none of the starter pokémon appear in the wild in Pokémon LeafGreen. You'll have to trade with other games.
you can't get the black flute in leaf green but you can in Pokemon ruby, sapphire and emerald then trade it to leaf green.
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you can get a shiny Eevee on Pokemon leafgreen but its rare. its about a 1/5000 to get it
There are two patterns in Pokemon FireRed and LeafGreen. If the pattern is colored, it means the Pokemon may be found there. If white, however, there is no way of finding a Pokmon.
IMPOSSIBLE
Rare candy 88CFA129 357400B2 51CF1F27 2E270374
It is rare on One Island
you find it in cave's and other places
Only zubats =)
it's rare to find a moonstone
by cheat