Fossil Pokemon
Hidden within the walls of the Shinou Underground are a variety of fossils, waiting to be discovered and resurrected with the power of science. Unlike previous games, each fossil is exclusive to Diamond or Pearl, to encourage trading.
Zugaidosu
This violent, Rock-type pachycephalosaur (yep, really!) uses its hard head to deal massive damage to its foes. It has an exclusive new attack, Double Headbutt.
Tatetopusu
Tatetopusu, a hornless triceratops-like Pokemon, uses the wide plate growing over its head to shield it from damage. Defense is its strong suit, which it gets even better at when it evolves, developing a steel covering.