Lady Rainicorn Pony

So lately I've been getting into Adventure Time, and I noticed the character named Lady Rainicorn. So I thought: why not draw her in the style of My Little Pony?

Well here she is! I gave her wings since in the show she does fly. As for the cutie mark, I was drawing a blank so I stuck with a simple color wheel as her talent seems to deal with rainbows. Wonder how Rainbow Dash would feel if a pony with a similar talent of hers would show up?