http://pokemon.marriland.com/diamond_pearl/pokedex/cherrim
Sinnoh PokeDex #59 is Cherrim.
Rotom is not in the Pearl Pokedex.
Either Cherim or Munchlax
Sneasel is number 144 in the Sinnoh Pokedex.
Number 25 on the pokedex in Pokemon pearl is BUDEW the grass & poison type Pokemon.
In pearl#80 is barboach.
Gachomp is #111 in the Sinnoh Pokedex.
Clamperl is #366 in the national pokedex.
spiritomb
Magicarp
Dialga is # 149 in the pearl pokedex
Arcanine is #59 in the national pokedex, and it is a Fire type Pokemon.