You can't, you have to trade over from FireRed or LeafGreen.
Fossils can be revived at the Museum in Pewter City.
Piplup does not exist in Pokemon LeafGreen or FireRed.
You cannot catch houndour in Pokemon leafgreen either get one from Pokemon emerald or Pokemon colosseum.
That item doesn't exist in leafgreen.
Go to the desert where you obtain the fossils
You revive your Fossils in the Museum that is in Pewter City.
You can't, you have to trade over from FireRed or LeafGreen.
Fossils can be revived at the Museum in Pewter City.
Piplup does not exist in Pokemon LeafGreen or FireRed.
No, you cannot find cyndaquil in LeafGreen.
you should go to gamestop
LeafGreen version does not have Growlithe.
On cinnabar Island, to the left of the pokemon center, lies a "laboratory". If you go inside, then go to the right and enter the third door. Talk to the Professor there.
In the grass...
You cannot catch houndour in Pokemon leafgreen either get one from Pokemon emerald or Pokemon colosseum.
You give it to the scientist in the cinnibar island lab that asks for fossils.