You have to level up Cranidos to Level 30 in order for it to evolve into Rampardos.
Cranidos evolves at level 30.
Cranidos is a Rock type Pokemon that can be revived from a Skull Fossil in Pokemon Diamond. It will evolve into Rampardos at level 30.30
Go to serbii.net or cranidos serbii.net
Cranidos evolves into Rampardos at level 30.
Evolve from Cranidos
level 30
Go under ground and find a cranidos fossealand evolve the cranidos into rampartos
30
level it to level 30
it evolves at lv. 30
evolves into Rampardos at level 30
to evolve cranidos you need to level it up to level 30 for it to evolve into rampardos