Palette Swaps

A Palette Swap is a feature in Worlds Collide 2, it only had 1 in the first game, but now in the Reboot it has 3 alternate costumes (4 if the default one is included).

Batman

 * Black: Default Color
 * Red: Resembles Robin
 * Purple
 * Brown

Baxter

 * Red: Default Color
 * Yellow and Silver: Resembles his Super Form
 * Blue: Resembles his Old School/2007 year
 * Green: Resembles his Brother Gunther

Goku

 * Orange: Default Color
 * Red: Resembles his Kaio-Ken Form
 * Green: Resembles Piccolo
 * Orange (Alt): Resembles his new form Super Sayian God

Homer Simpson

 * White: Default Color
 * Red: Resembles Bart Simpson
 * Green: Resembles Ned Flanders
 * Light Blue: Resembles The Comic Book Guy

Ichigo

 * Black: Default Color
 * Red:
 * Blue:
 * Green:

Ike

 * Brown: Based on his Apperance from Fire Emblem Radiant Dawn
 * Yellow: Resembles the outfit of his father, Greil, from Fire Emblem: Path of Radiance.
 * Red: Resembles Zelgius from Fire Emblem: Path of Radiance.
 * Blue: Resembles Sigurd, the first protagonist of Fire Emblem: Genealogy of the Holy War

Little Mac

 * Green: Default Color
 * Yellow: Resembles his Title Defense Costume
 * White: Resembles Piston Hondo
 * Red: Resembles his Contender Mode Costume

Luigi

 * Green: Default Color
 * Orange: Resembles Mario's Pinball form
 * Pink and Red: Resembles his Wrecking Crew costume
 * Blue: Resembles Mario's United States version Mario Bros.

Mario

 * Red: Default Color
 * White: Resembles Fire Mario
 * Light Blue and Pink: Resembles his Japanese version of Mario Bros.
 * Yellow: Resembles Wario, but the M is Green

Mega Man

 * Blue: Default Color
 * Red: Resembles the Rush Coil
 * Green: Resembles the Leaf Shield and Hyper Bomb
 * Brown: Resembles the Metal Blade

Naruto

 * Orange: Default Color
 * Light Blue
 * Green
 * Maroon

Pac-Man

 * Yellow: Default Color
 * Blue
 * Brighter Yellow
 * Black

Ryu

 * White: Default Color
 * Red: Resembles Ken Masters, his best friend and rival.
 * Pink: Resembles Gulie
 * Dark Purple: Resembles his evil form, Evil Ryu

Snake

 * Grey: Default Color. Based on Snake's standard camouflage suit from Metal Gear Solid 2: Sons of Liberty.
 * Red: Based off the Fury's Fire camouflage. Also resembles Snake's outfit from Snake's Revenge.
 * Blue: Based off the Splitter camouflage. Also resembles Snake's outfit from the MSX version of Metal Gear.
 * White: Based off the Snow camouflage.

Sonic

 * Blue: Default Color
 * Purple: Resembles NiGHTS from NiGHTS into Dreams
 * Cyan: Resembles the Crystal Ring Power-Up
 * White: Resembles Silver with the Shoes

Wii Fit Trainer

 * Light Blue: Based on her design in Wii Fit, but the hair is based on Wii Fit Plus.
 * Green: Based on her design in Wii Fit Plus and Wii Fit U, though less revealing.
 * Red: The color that represents the Aerobics category of activities.
 * Yellow: The color that represents the Balance Games. Also loosely based on an alternate outfit from Wii Fit Plus which only appears when a Yoga or Strength Training activity is being done in "My Wii Fit Plus" mode.