We know for certain that these character gimmicks (like Lucario's Aura or Ice Climbers' special traction), and then there are those who share a gimmick (like how the Links and Hero had a passive shield to block projectiles). Now my question is who else should get a fighter ability? I wanted to look up some source material for certain fighters, so here's an example of a few that come to mind, while others may sound a bit silly to work but it gets that general idea:
Mario & Luigi (Footstool Stomp): This one is easy and obvious. Its simple: When Mario or Luigi footstool jumps an opponent, it does a small bit of damage. It would be like the opposite of Piranha Plant's, where if someone footstools it, PP would damage it a little.
Pokemon (Abilities): Since Generation 3, Pokemon had abilities to get an edge in battle. Some would have these skills from those games, while others can get something more unique to Smash.
- Pikachu/Pichu (Static): When Pikachu/Pichu gets hit directly, there's a small chance that the opponent will get stunned for a brief period.
- Mewtwo (Psychic Grab): Mewtwo is able to grab opponents and items from a short distance and can be treated as it does physically.
- Pokemon Trainer (Torrent/Overgrow/Blaze): When Squirtle, Ivysaur and Charizard take 100% damage, they will glow a blue/green/red aura respectively and their elemental attacks are boosted in power.
- Greninja/Incineroar (Torrent/Blaze): Same thing with Pokemon Trainer.
- Fox/Falco/Wolf (Barrel Roll) - The Star Fox characters have a gimmick that gives them longer dodge frames on ground and air. I'm not sure I wanted to add a deflecting effect because that may sound broken lol.
- Samus (Melee Counter) - Samus' parry is altered so when she does parry, she quickly lets out a counter shot. The same applies when she runs, but it'll be a little weaker.
- Mr. Game & Watch (2D): This one I made up and it's funny. Mr. G&W has the small chance to avoid attacks even if he is not defending himself. This reminds me of that one meme with Simon failing to hit him with his because he's paper thin.
What more characters do want see have a fighter ability? It would be cool to hear some creative and original ideas in the comments, whether it is serious or funny.