User blog comment:ChibiDialga/Nintendo Direct/@comment-5174888-20150402222511/@comment-30602727-20150402224939

@ Fujiwara - I don't think that's what Embrace meant.

I think he means they they need to originally derive from a video game, which Miku did not. She derived from a computer software originally, while everyone else came from video games originally.

That's why it's even absurd when people beg for Goku or Naruto to be in SSB