Metal Gear

The green Greninja represents the Frog, an amphibian creature with a green color scheme. The blue King K. Rool minion represents the Snake, a reptilian creature who features a cape and a blue color scheme. The stage and music track represent the Eclair Palace, the castle located in the Custard Kingdom in Kaeru no Tame ni Kane wa Naru which features a 2D side-scrolling platform sequence. The stage and music track represent Kirby's Dream Land, a Game Boy-exclusive game featuring a 2D side-scrolling gameplay mechanic similar to Kaeru no Tame ni Kane wa Naru. The Sablé Prince Assist Trophy enemy reference his appearance as the main playable character of Kaeru no Tame ni Kane wa Naru, who can transform into the Frog or the Snake. Other trivia: This spirit's Shield type references the Prince of Sablé's role in Kaeru no Tame ni Kane wa Naru by rescuing Princess Tiramasu from Lord Delarin.

The chartreuse Snake puppet fighter represents Liquid Snake, the villainous "brother" of Solid Snake with blonde hair. The stage is based on Shadow Moses Island, the main setting of Metal Gear Solid, which features the debut appearance of Liquid Snake as the main antagonist. The stage features either Metal Gear REX or Metal Gear RAY as background characters, the two Metal Gears piloted by Liquid Snake and his mental doppelganger, Liquid Ocelot in the Metal Gear series. The Poison Cloud hazard references FOXDIE, an engineered retrovirus developed by the Defense Intelligence Agency modified to kill Liquid Snake. The second battle condition references how Liquid Snake possesses Big Boss's superior soldier genes compared to Solid Snake's recessive genes, which allows him to be proficient in hand-to-hand combat.

The green Snake puppet fighter represents Naked Snake, while the other three Snake minion fighters represent his clones: Solid Snake, Liquid Snake, and Solidus Snake. The stage represents Tselinoyarsk, the main setting of Metal Gear Solid 3: Snake Eater, which takes place in a forested country. The stage's hazard features a rain effect and a waterfall, referencing the Sorrow, a ghost soldier accompanied by rainstorms whom Naked Snake encounters after he jumps from a waterfall and enters the spiritual realm. Other trivia: In World of Light, the Naked Snake spirit on Dharkon's side of the Final Battle map matches with the Baby Mario spirit on Galeem's side; both are protagonists of the prequels to their respective video game series.

The green Snake represents Snake Man, a green Robot Master who shares the same snake-themed name. The stage's trees and music track represents the Snake Man Stage, a scaled stage which features Snake Man as a boss in Mega Man 3. The Bombchu item references Snake Man's weapon, Search Snake, which allows him to generate robotic snakes that can crawl across solid surfaces.

Metal Gear Solid Series

The black Snake puppet fighter represents Solidus Snake, the villainous "brother" of Solid Snake who wears a black exoskeleton. The stage is based on Shadow Moses Island, the main setting of Metal Gear Solid, in which the game's events were instigated by Solidus Snake. Snake starting the battle with a Killing Edge references Solidus Snake's usage of dual katanas during his final boss battle in Metal Gear Solid 2: Sons of Liberty. The Move Speed ↑ rule activates when Snake reaches 50% or higher damage, referencing how Solidus Snake uses his exoskeleton to enhance his speed and perform dash attacks after being damaged during his final boss battle.

A SEAL member who infiltrates the Big Shell to suppress a terrorist group threatening to destroy it. He joins forces with Raiden, a new recruit in the special-forces unit called FOXHOUND. Disguised in order to secretly infiltrate the Big Shell, Pliskin is actually Solid Snake.

A former member of FOXHOUND with an IQ of 180 and mastery of six languages. He's an infiltration specialist whose ability to carry out missions under any conditions has made him a legend. He's saved the world three times from the threat of bipedal, nuclear-armed mechs called Metal Gear. Currently he's working with the anti-Metal Gear group known as Philanthropy.