That's one angry pickle!
I set out to draw a lumpy little monster, but when I finished him I thought he looked more like a pickle. That seems weirder and funnier to me, so pickle it is!
This was a pretty quick little illustration; around an hour and a half or so. I'm not totally happy with the white lightning bolt or the glow. I need to revisit this and redo the bolt one of these days.
Drawn in Photoshop on the graphic tablet.
Here's the original sketch for Zapp. The final drawing didn't change much.