I think I finally managed to correct the both warpers. The pink pixels weren't because of the brush tool, I used pencil for the outlines (thats why they are so rough :S ). But now I know what went wrong. I deleted the FF00FF color and copied the pictures to a transparent background. Then I saw that there were still some nasty semi-transparent pixels which I didn't see on other colors o_O I corrected them, I really hope it will work now....
Links to them:
Warp Boy
Save Girl