Looks like something that would appear in The Marvelous Misadventures of Flapjack
For example, from 7:25:
https://www.youtube.com/watch?v=VWGTOgT_Uqo
(
Monocromatico Lady Godiva's horse,
Wed 3 Jun 2015, 13:30,
archived)
That was amazing!
I can't believe I've never even heard of that show.
(
Smallbrainfield,
Wed 3 Jun 2015, 13:45,
archived)