Fox (Melee)
3
This Melee Stage has water that you can't swim in, but you can swim in it in Ultimate.
Great Bay
This Fox Custom Up B gives him amazing killpower.
Twisting Fox
This Smash 4 Character has the most colors in the series, at 16.
Little Mac
This Smash 4 Control Scheme involves mapping the Right Stick to Special, granting easy perfect pivots.
Bidou
Zelda (4)
6
This Melee Character has a Target Test stage, although it goes unused in normal gameplay.
Sheik
This Link Custom Move gives him a spike.
Meteor Bomb
In smash 64, This Character has a Blue Team color that you cannot select outside of Team Battles.
Captain Falcon
Platform Cancelling in Brawl only works on platforms that are labelled as This in the game's code.
Moving
Link (64)
This stage is the only stage to appear in every smash game, except for Brawl.
Dream Land (64)
This Marth and Lucina Custom Move gives them a kill confirm off Forward Throw.
Crescent Slash
This is the only Ultimate Character where out of the male and female versions, the female is the default.
Inkling
This is the only Melee Character that can cancel their taunts with a teeter animation.
Dr. Mario
Sonic (Brawl)
5
Despite This Smash 4 Omega Stage having walls, you cannot wall jump on them.
Pac-Land
This Little Mac Custom Move ignores shields.
Guard Breaker
This Melee Captian Falcon color has the thinnest ECB.
Default
This Smash 64 Technique is performed similarly to a RAR, granting certain characters a boost of speed before their jump.
Teleport
Giga Mac (4)
5
Golden Plains and This Stage are the two stages from 3DS where UI accommodations were made for the transition to Ultimate.
Find Mii
This Dr. Mario Custom Down B improves his recovery greatly.
Soaring Tornado
This is the only character in Brawl to have only 4 colors.
Pikachu
This Brawl Lucas Technique extends the height of his double jump greatly.
Zap Jump