Burmy.
In the Diamond and Pearl Pokedex, number 45 is Burmy. In the National dex, no.45 is Vileplume.
You can find number 45 almost an where in Pokemon diamond and all you have to do in smear some honey on a tree and get number 45 which is the Pokemon Burmy that evolves into Wormadam
Burmy
It depends. In the Sinnoh Pokedex, #45 is Burmy. In the National Pokedex, #45 is Vileplume.
Sweet Honey Trees
# 45 is accually burmy
lv 45
Its burmy
45=burmy 46=wormadam
lv.45 into Flygon
Pokemon #45 would be Burmy, though it is rather rare and you can only find it by putting honey on a tree
Its somewhere around/in battle tower