Im Not Counting This As RWDE Because There Isnt Any Inherent Criticism Here Yet. - Tumblr Posts
Honestly it depends, with death battle, they use as many feats as they can while also looking credible... Including using feats from other characters that same power set to do some bullshit.. but in the case of yang.. I think they might mention this but then again considering DB is not owned by RT anymore (thank god, and good fuckin riddance rt, Fuck. You.) so thus no real chance of showing bias when being logistical they might not.
DB is meant to depict the characters at their strongest, and while I certainly have never played any final fantasy games i can sure as shit that if they are doing a rematch their going to list her feats that are far beyond the ones they did mention in the original.
But eh it all depends on the series itself.

Would that still be canon though?