I'm guessing that # 102 is chatot, and he usually appears in routes 222 and 224 during the day. (I'm not sure if they've changed this in platinum or not, I haven't tested this yet, but in diamond there was a boy in the name rater's building that would trade you a chatot for a buisel)
151 I'm pretty sure is Manaphy, you can see it by looking at the book/picture behind the owner of the mansion (where the trophy garden is) you should be able to add it to your dex that way.
I'm not sure what 152 is, unless you where referring to the national dex in which case you'd be lookin for Exeggcute, Mew, and Chikorita.