After reading one or two of y’all’s posts, and thinking about it, I guess I can see these character glitches possibly leading to something, since it seems the devs had little reason to touch these characters (unless said characters were part of a balance patch), however I still think they’re very unreliable for speculation. If Bayonetta was used for the ARMS character, it could easily have been for her side-smash which would fit any of the characters in the way I’d assume they’d use it. There’s a number of characters these glitches could possibly point towards, too, if they actually mean anything. Visual glitches kinda just sound like they just screwed up some texture-related thing, too, so it likely has nothing to do with mechanics or whatever (I don’t know how programming stuff works though so who knows, maybe they accidentally screwed up texture stuff somehow while messing with unrelated things; I mean, weird bugs that seem unrelated to something added/changed seem to happen in Minecraft updates/snapshots...).
Bowser Jr. doesn’t really seem to have any connections to Piranha Plant, however, aside from Plant’s pot having its own hitbox I suppose (I forgot if it actually did) and maybe the cannonball.
I also don’t know who Ness would be used for unless the Pigmask Army is about to win babyyyyy; Ness’s eyes disappear because our great king never shows his eyes, or the cool chubster’s PSI Shield uses Ness’s PSI Magnet as a base.
and admittedly I did think the Duck Hunt glitch could be for Banjo & Kazooie but then it seemed less likely after turning out to be SD-card specific and stuff, and I could’ve sworn I saw that info about B-K using Ridley as a base before and that it came from a dataminer but it appears to be gone if it really did exist, maybe I’m just confused. I think it makes sense though, one of Ridley’s moves is similar to one of Kazooie’s I think, and...uh...wings.