Well I must say that this is one of the most interesting renditions of the bat version of Rainbow Dash, or as uotapo
likes to call her, Rainbow Bite. There are several things that I admire about this design, like how it mostly follows the design of Flutterbat from the actual show. The coat is nicely darkened, the eyes are piercing red, and the mane and tail are nice and messy. I also like the new features you gave her, like the pointy wings. On top of that, I appreciate how you slightly enlarged the hair, because it sort of indicates how long RB has been living as a wild creature. The criticisms I have for this drawing are only minor. Firstly, I would raise her right hindquarter higher, because for now, her behind appears to be pretty lopsided. Second, I would still give her a cutie mark, but it should be something much spookier, because notice how Flutterbat's cutie mark changed from butterflies to bats. Maybe you could change the color of the bolt from rainbow to yellow, like a real bolt, that way, it would come off as more threatening. But other than that, I think this is a fine drawing of Rainbow Bite. your goal was to create a spooky, lineless picture of RD as a bat, and that's exactly what you produced! Keep up the great work, SiMonk0!