Original idea from some Vocaloid pic [link]
don't know who's the real artist though.
Deciding which style this drawing's supposed to be drawn in is sorta the hardest. I'm not sure whether I'm supposed to use my style, or Pen's stile or Natasha's style, and it ended up as sorta a weird mix of all three.
References from [link]
Adventure Time (c) Pendleton Ward
the genderbent version (c) Natasha AllegriEDIT
I've noticed some of you kept on asking me where Lady Rainicorn & Lord Monochromicorn are. Well here's to you. I forgot to draw them that time & I have no reference pictures of them. I MIGHT draw them both sometime later if I'm free.