No, you cannot find cyndaquil in LeafGreen.
Piplup does not exist in Pokemon LeafGreen or FireRed.
LeafGreen version does not have Growlithe.
There aren't growlithe in LeafGreen. FireRed has growlithe, LeafGreen has vulpix.
That item doesn't exist in leafgreen.
you cant go underwater in leafgreen!!
you can't catch aipom in leafgreen but you can get one from Pokemon colosseum or Pokemon emerald.
Oddish is a FireRed-exclusive Pokemon in Generation III. To obtain an Oddish in LeafGreen, it has to be traded.Oddish is a FireRed-exclusive Pokemon in Generation III. To obtain an Oddish in LeafGreen, it has to be traded.Oddish does not appear in LeafGreen.
You cannot catch houndour in Pokemon leafgreen either get one from Pokemon emerald or Pokemon colosseum.
there is no such Pokemon
none. use the itemfinder in multiple locations in berry forest to find berries.
I don't really know about Pokemon leafgreen, but in Pokemon red you can get it in seafoam islands. Hope this helps!