Funky Kong (uses surfboard in Side Smash, as well as to glide like Peach and Daisy)
Yarn Yoshi (would be lighter, and would become giant for his final smash)
Slippy (Would be slower, but his blaster would be stronger and his reflector would be bigger. Final Smash is themed after Star Fox Guard)
Raichu (Complete the evolution line!)
Ninten (up b is replaced with 4th-D Slip and his final smash is Eight Melodies)
Black Shadow (basically Sm4sh Ganondorf)
Dry Bowser (would be lighter and would have Koopa Klaw from Melee)
Impa (Ocarina of Time version or Skyward Sword version)
Hilda (has some staff attacks and has darkness effects)
Peppy (just to complete the original team Star Fox)
Classic Link (the one from the original Legend of Zelda. Bombs stay put where you spawn them and cannot be moved, boomerang flies through surfaces, and up b is now using the raft.)
Mr. Game and Watch Gallery (same thing except the Game and Watch characters he turns into are taken from the Mario themed remixes from the Game and Watch Gallery series.)
Galacta Knight (slighty stronger but heavier)
Shadow (I dont like him as an echo but its feasable)
Alph (He uses rock pikmin and has Brittany and Charlie as alts. Louie takes his place as Olimar's alt.)
Proto Man (uses custom specials from Sm4sh, and he has his projectile stopping Proto Shield out whenever he jumps.)
Medusa (...no comment here.)
Ms. PAC-MAN (has different fruits with different functions.)
Jeanne (...no comment.)
Octoling (same moveset but with Splatoon 2 weaponry. Final smash is Tenta Missiles.)