Only two of Ub Iwerks’ Flip the Frog cartoons were made in color, and one of them was the first one, Fiddlesticks, seen below. I’ve always preferred the early Flip design to the later one… he looks much more like a frog, and much funnier. I would guess the design was changed so it would be easier to animate him turning his head… the designs are so different they don’t even resemble each other. If you want to see the later design, check out the coloring book posted at Comicrazys. I’ve also posted a number of Flip the Frog and other Ub Iwerks cartoons previously that can be seen here.
Note the apparent Mickey Mouse rip-off late in this cartoon… since Ub Iwerks created Mickey Mouse a couple years before this was made, it hardly seems like a rip-off, though.