Honestly a hard choice. I love the ugly ass style of Wario Land 4, and 1-3 have an interesting style themselves. VB is crazy though, they look so high quality. You can really see Wario's muscles in action.
It's got the wacky stylings of a WarioWare microgame and the gameplay of something like Wario Land, Pizza Tower or AntonBlast, so there's definitely some charm here. Saw it advertised on Reddit here:
And the link they posted was this:
So...
I thought they were bats too..
I looked up "Arab Bat" (since they mainly appear in Arabian Nights) and found this which I guess looks somewhat similar with its big nose.
Part of the "thought they were bats" train... after all, birds usually have beaks and not fangs. Though I also though the green part of their face was a pig-like nose, and the two little dots its nostrils. But when you defeat one, they're...