-Kirby's Neutral Special being his most iconic attack and one of his most useless attacks at the same time.
-Kirby without the Slide Attack as a Down Tilt.
-Palutena's face.
-Pikachu without Iron Tail.
-Wii Fit Trainer doing that stupid pose everywhere, in her artwork, in her attacks, in her symbol, in the Wii U box art...ugh.
-Lucario covered with that stupid blue smoke, his megaevolution looks like a blue cloud.
-Fox's voice...not Greninja's voice, that's awesome.
-Peach's hair looks very cool in her artwork, but not in the game.
-"Clone Artworks". Example: Bowser and Donkey Kong; Pikachu, Samus and Palutena; Toon Link, Sonic and Fox, etc.
-Pit screaming like an idiot.
-Brawl Victory Themes, some of them are really bad in my opinion, like the Victory Theme of the Metroid series and Zelda series and the Victory Theme of Yoshi sounds pretty boring, his 64 Victory Theme was much better.
-Megaman's symbol, I don't know, it doesn't look right.
-Halberd doesn't look HD.
-Little Mac's Victory Pose.
-Sheik's design, it looks pretty bad compared to the design of Hyrule Warriors.
-Pyrosphere looks cool, but I'm tired of Metroid Stages with Lava/Acid.
-In the Character Selection Screen, Olimar's name is just Olimar instead of Pikmin & Olimar, but Rosalina's name is Rosalina & Luma.
-Bowser's Godzilla voice.
-The final hit of Mario's Super Jump Punch needs to sound like the 1-UP sound of the Mario games.