Well, if we can more spirits, then I have a few spirits in mind for the Spirit Events:
Fang the Hunter (Sonic SuperStars): Dark Samus or Wolf
Trip the Sungazer (Sonic SuperStars): Meta Knight or Sheik
Orbot and Cubot (Sonic the Hedgehog) Pac-Man and Kirby
Sage (Sonic Frontiers): Bayonetta
Wave the Swallow (Sonic Riders): Zero Suit Samus or Rosalina and Luma
Storm the Albatross (Sonic Riders): King K. Rool
Zavok (Sonic Lost World): Giant Bowser
Zazz (Sonic Lost World): Iggy Koopa and Giant Pac Man
Zeena (Sonic Lost World): Samus
Zomom (Sonic Lost World): Giant Kirby
Master Zik (Sonic Lost World): Mewtwo
Zor (Sonic Lost World): 5 Mr. Game and Watches, Giant Falco, and Luigi
Flickies (Sonic the Hedgehog): An Army of Tiny Falcos
Froggy (Sonic the Hedgehog): Incineroar and 2 Greninjas
Zero (Sonic Adventure): 2 Metal R.O.B.s
Tikal the Echidna (Sonic Adventure): Palutena
Aiai, MeeMee, Baby, GonGon, Doctor, and YanYan (Super Monkey Ball): Dr. Mario, 4 Diddy Kongs, and Donkey Kong
Captain Crabuchin (Super Monkey Ball): Giant King K. Rool
Dr. Bad Boon and Dr. Bad Boon's Assistant (Super Monkey Ball) Dr. Mario and Donkey Kong
Spinning Naysayer (Super Monkey Ball): Giant Sonic
Boxing Naysayer (Super Monkey Ball): Giant Little Mac
Wind Naysayer (Super Monkey Ball): Giant Kirby
Fire Naysayer (Super Monkey Ball): Giant Charizard
Naysayer Crab (Super Monkey Ball): An Army of Meta Knights
Yin Yarn (Kirby's Epic Yarn): Ganondorf
Eflin (Kirby and the Forgotten Land): Tiny Pit and Kirby
Leongar (Kirby and the Forgotten Land): Incineroar
Gorimondo (Kirby and the Forgotten Land): Donkey Kong
Sillydillo (Kirby and the Forgotten Land): Sonic
Claworline (Kirby and the Forgotten Land): Wolf, Snake, or Incineroar
Koopa Kid (Mario Party): Bowser Jr.
Red Koopa Kid, Green Koopa Kid, and Blue Koopa Kid (Mario Party 5): 3 Bowsers
The Star Spirits (Paper Mario): Rosalina and Luma, Peach, Kirby, Ness, Ice Climbers, Jigglypuff, Robin, and Mario with a Beetle
Whacka (Paper Mario): An Army of Sonics
Brighton and Twila (Mario Party 6): Charizard and Zelda
Goombario (Paper Mario): Ness
Kooper (Paper Mario): Squirtle
Bombette (Paper Mario): Kirby or Jigglypuff
Parakarry (Paper Mario): Tanooki Squirtle
Lady Bow (Paper Mario): Clear Kirby
Big Lantern Ghost and Watt (Paper Mario): Giant Shy Guy Mii and Tiny Pichu
Sushie (Paper Mario): King Dedede or Yoshi
Lakilester (Paper Mario): Ridley or Fox
Twink (Paper Mario): Tiny Pichu
Jr. Troopa (Paper Mario): Bowser Jr.
Kolorado Koopa (Paper Mario): Wario or Golden Pikachu
Goombella (Paper Mario: The Thousand Year Door): Kirby
Koopa (Paper Mario: The Thousand Year Door): Squirtle
Madame Flurrie (Paper Mario: The Thousand Year Door): Bayonetta with a Gust Bellow
Admiral Bobbery (Paper Mario: The Thousand Year Door): Charizard
Ms. Mowz (Paper Mario: The Thousand Year Door): Pikachu
Grodus ( (Paper Mario: The Thousand Year Door): Palutena
Lord Crump (Paper Mario: The Thousand Year Door): King Dedede
X Nauts (Paper Mario: The Thousand Year Door): An Army of Kirbys
Beldam (Paper Mario: The Thousand Year Door): Lucas, Ice Climbers, or Luigi with a Freezie
Marilyn (Paper Mario: The Thousand Year Door): Robin
Hooktail (Paper Mario: The Thousand Year Door): Giant Ridley
Bonetail (Paper Mario: The Thousand Year Door): Giant Curry Bowser
Rawk Hawk (Paper Mario: The Thousand Year Door): 3 Giant Falcos
Grubba/Macho Grubba (Paper Mario: The Thousand Year Door): King Dedede, Giant King Dedede
Jolene and Mush (Paper Mario: The Thousand Year Door): 2 Isabelles
Darkly (Paper Mario: The Thousand Year Door): Robin
Doopliss (Paper Mario: The Thousand Year Door): An army of Kirbys
Professor Frankly (Paper Mario: The Thousand Year Door): Dr. Mario
Penny Crygor (WarioWare): Isabelle
Mike (WarioWare): Metal R.O.B. and Dr. Mario
Lulu (WarioWare): Female Villager
Red (WarioWare): Mii Swordfighter and tiny Kirby
Master Mantis (WarioWare): Greninja and Lucario
Mrs. Pac-Man (PAC-MAN): 2 Pac Mans