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
GLACEON
No such Pokemon exists.
Unown
unown
Glaceon
Snorunt
rotom