The only series I think is 100% misrepresented in Smash on almost all cylinders is ROB. His moveset is fine and I don't mind the lack of a Gyromite stage too much, but Subspace was an insult to the established Gyromite/Stack-Up lore and characters, made worse by ROB's role being the part of Subspace most frequently acknowledged and reinforced for that character's representation in later Smash games.