How about Shard, and Perfect!Steven? from @perfectstevenau
You know, in reality, Shard wouldn't let Perfect!Steven get anywhere near him, let alone fuse with him. Pinkie, however...well, Pinkie and Perfect!Steven are two peas in a pod.
You better watch out!
This fusion would be volatile at best, absolute psychopath at worst. They inherit Perfect!Steven's perfectionistic tendencies, mashed together with Pinkie's insanity and disregard for any and all life. Surprisingly, this would be a stable fusion, since both of them kinda have the same relative goals.
@perfectstevenau come take your disaster child, they're tearing the fabric of spacetime.














