DEATH BATTLE

DEATH BATTLE is an online web-series dedicated to pitting two fictional characters together to see who would win. They have done multiple episodes involving My Little Pony: Friendship is Magic characters.

References in My Little Pony
A possible reference was made in a comic cover with Rainbow Dash and Starscream chilling together, notably not killing each other.

Other connections

 * Jason Michas, voice of Ragamuffin appeared in an episode of DEATH BATTLE, reprising his role as Bucky O'Hare.