Sooo when I saw this challenge this is the first image that popped into my head: A Formless, which is a gooey minion of the Skeleton King's from Super Robot Monkey Team Hyperforce Go! with a Heartless from Kingdom Hearts didn't seem like a bad thought...and so here it is in its fruition! (As bad as it may possibly be.)
My brother always laughs when I accidentily call the Heartless 'Formless.'

"Die formless, die!"
"Wrong media! Wrong media! xD"

*ahem* So there...