Derp Breeding Coin

Created after April Fools 2011. Derp breeding coins were originally slated to be retired after their initial release since they were a "gag" item, and not really a serious breeding option, but they were so well received by the userbase that they were allowed to stay. Derp offspring are always unbreedable, and cannot be made breedable by any means. They are produced by overlaying both parent's PNG's and mixing them using a layer blending mode, which generally results in odd, strange, ugly or plain weird looking babies.