pokemon platinum catch pkmn的问题

For Sinnoh Dex:
#151 Manaphy Catch:Transfer from other games
See: The book in Trophy Garden
#152 Rotom Catch: Haunted house inside Eterna Forest (Need cut to get in)
For National Dex:
#151 Mew Catch: None(Trade from Pal Park)
#152 Chikorita Catch: None(Trade from the Pal Park)
To find them you MUST trade them from other versions (eg: FireRed, LeafGreen etc.), as no trainer in the game have these two pokemon.
Sometimes you can find trainers using Chikorita, but they're in the Battle Facilities.