you have to steal other peoples flags. this lets you get more decorations set up, and eventually remove a few boulders. it doesn't expand your base but makes it more roomy.
You have to dig it out under ground and you only get it in Pokemon pearl.
Grass and Ground
go under ground and find fossils
no you can only use the bike above ground
You can go under ground
fossils are found under ground
you cant get a cranidos in pearl unless you trade it from diamond
you have to go under ground and dig it up
under ground by diggin
Rock/Ground Pokemon from level 55 to 59.
you find it on the ground
In sunnyshore city in front of the lighthouse there is one on the ground