Hey it looks great! (you did paint Dash's upper teeth tongue-coloured btw lol)

Some pointers:

One way to colour from B&W lineart (if you don't have the PSD file) is to put the image on a layer with layer properties set to "Multiply" and put the colour on a layer beneath it, and your program will treat the white bg as transparent and the lines as opaque, allowing you to have the colours on their own layer. And when using the fill bucket to colour areas, depending on which program you use you can either tell it to increase the size of the area by a pixel or two, or set it to "all layers" and raise the tolerance a bit (in photoshop), in order to avoid the thin white lines where the colour meets the lineart.



But yeah, otherwise great stuff, theyre both vibrant and eye-catching so superb job, you even got Dash's mane and tail in the right order, I keep messing that up myself!