Its most likely based off of Honduran bats:
THIS is why I have faith in Koromori ^.^The first thing I thought of was a Koffing when I saw the picture... With Zubat's wings coming into my mind right after... it just looks so stupid... But hopefully if it does exist then we can alternate between it and Zubat to lessen the annoyance...
I'd only be okay with it if it was... If it wasn't it will bug me...
... Oh god... If it does hopefully it evolves into...
He means this bat:
He means this bat: