If you could change one thing about Robin in SSB4, what would it be?
I'd give him/her slightly more running speed.
Morgan alts for both genders.
I'd probably tweak Nosferatu or replace it with something else. With how slow it is, it usually doesn't come in handy too often. Then again, I have been surprise-Nosferatu'd before by a CPU.
There's also the fact that Robin can't Nosferatu unless s/he is a Dark Mage or Sorcerer. I like the Ignis idea @
AustarusIV
suggested, or maybe Robin could have different swords with the ability to switch them around a la Shulk's Monado. Any of them breaking would still lead to a short time of Bronze Sword, though.
Levin Sword- Can cover distance.
Killing Edge- Speedier, but lighter. Could also function a little like Marth's tipper.
Armor Killer- Heavier, but stronger.
Silver Sword- A stronger Bronze Sword, the happy medium of the group.
Wyrmslayer- Strong against ATs, bosses, and Pokéball Pokémon.
Soothing Sword- Heals a tiny bit of Robin's HP (would need something to make sure it isn't broken).
Glass Sword- The strongest of them all and not as slow as Armor Slayer, but breaks VERY quickly.