While battle damage is used for Little Mac in the Wii U version, data suggests that other characters were planned to have similar effects. This can be seen in unused textures for R.O.B. in the game's data which seem to show battle damage. This is a remnant to Super Smash Bros. Brawl in which characters were also planned to have battle damage, but were left out.
Contributed by GamerBen144
Attachment
Attachment