ice and water are fairly effective against rock
Moss Rock does not exist in Leafgreen as it was introduced in Diamond, Pearl, and Platinum.
In The Navel Rock
you find it
no
Watch leurois Pokemon leafgreen walk through part.
its navel rock u idiot
in your bum bum
Navel Rock
ISLAND 1
rock tunnel
You get it at Navel rock. Trade Ho-oh from Pokemon colosseum and trade lugia from Pokemon xd gale of darkness to leafgreen.
Fire-type Pokemon are weak against Water, Rock, and Ground-type attacks.