cascoon (051) can be found in route 205 near Eterna City. It is a purple cacoon sort of thing with spikes! Hope that helps!
You can find em in and next to eterna forest, in route 224 and north of resort area
its combee and u can find it in honey trees
You find Number 53 of you Platinum Pokedex is... Combee! You can find him in like any route about the Twinleaf section.
cascoon and dustox
in the sinnoh reigon chatot in the national exeggcute
Sinnoh Dex: Aipom
Swinub
Heatran is a ledgendary in Pokemon platinum.
yes but sinnoh
The pokemon is Mareep. Find it in the grass near Valley Windworks.
if you are talking abuot pokedex number 53 it it persian a trainer has one on route 221
Pokemon Number 169 in Platinum is Leafeon
combee
haven't got platinum but on pearl No# 53 is combee and can be caught very raley on honey trees or by fighting the woman by the berry masters house whichs combee is lv 15
Pokemon number 151 is Manaphy
Unown
Snorunt
rotom
gengar
wormadam.
its golem