Because it's a toad going to battle in a way that's completely separated from the game. Battletoads is about toads going to battle, but not at all in the medieval sense. I get some of the confusion because there's sort of a fine line here, although I don't think there's really much of a gray area when it comes to fitting this theme.
For what it's worth, deborah sent me a PM too and it's all water under the bridge at this point. Gotta understand that real people with real emotions are putting work into these designs, so it sucks to have one rejected.
Kudos to all of the artists putting out designs week after week.