I keep seeing this weapon on people's profiles, sigs and what not but i can't find it in any of the shops. so where and how do i go about getting a Butterfly Swallow or Butterfly Halberd?

The butterfly halberd was a prize from one of the special events. Unless someone is willing to sell one you cannot buy one. Those are special items only available during special times. :yes:

However, there's no rule that says you couldn't buy a weapon, combine it with a halberd, and have a two ended one.

Allrighty, well thanks for the info, and whats that weapon called anyway? i couldent find it anywhere over the net

As Annihiliate said, it's called a Butterfly Halberd. You can see all the rare prizes from events if you look in the Events Archive forum.