Good style, non-authentic animation
While you managed to recreate the looks of Patapon, you couldn't recreate the way it animates. Patapon has a certain way of making objects move/wiggle slightly all the time. The images seem to "live".
Also, the cake looks good in itself but kinda doesn't fit the style. Try making a cake purely from black outlines, only this one color. If it is recognizable, insert a few splashes of white/pinkish to fill the empty space in it. This *should* give you a Patapon cake.
I like this idea. Just give it some more life and maybe some Patapon chanting. As it is now, it seems too static still.