in the national dex it is lapras and in the sinnoh dex it is carnivine
146 = Moltres 131 = Lapras
Carnivine
The Pokemon Lapras a water type Pokemon is the 131 Pokemon on platinum and can be found on Victory Road after getting past the guy standing in front of the doorway inside the cave.
Aron.
Route 131.
route 131
National: #131
carnivine
its at the pal park on route 131 and you have to catch them.
you have to dive near route 131
you find him in the sky pillar in route 131
Route 131, inside sky pillar