you don't all you do is hug a tree.
Pokemon #151 Mew. Pokemon #152 Chikorita.
152 is rotom.
The 152nd Pokemon is Chikorita.
151 manapy 152 rotom
= 152
Search Pokemon Modifier AR code for Pokemon Pearl on Google of Yahoo and read the description and add the code. I'll tell you the description anyway. Discard the amount of Masterball or Heart Scales so they equal 152 (493 - ? = 152 therefore you must discard 341 Masterballs/ Heart Scales). Then go into tall grass and hold l and walk around until you encounter Chikorita.
In the sinnoh pokedex rotom is number 152 but in the national pokedex rotom is number 479 and chickorita is number 152
Sinnoh Dex #152 -- Rotom National Dex #152 -- Chikorita
in Pokemon diamon, pearl nad platinum there are a newer and wider variety to that of previous generations. in generation 4 you have new legendaries (Palkia, dialga, giratina, lake guardians etc.) however i would strongly recommend playing the 5th generation, as there are 152 extra Pokemon the highest number of new releases. trust me it mad!!
rotom
Pokemon 152 is Chickoreta
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.