This goes for each prefer character matchups in their series, wins, loses, and draws. So anyways let's get started.

Characters preferred opponents W-L-D
Mario VS Sonic (Sega) L
Luigi VS Tails (Sonic) W
Donkey Kong VS Knuckles (Sonic) W
Wario VS King Dedede (Kirby) L
Peach VS Zelda (Zelda) W
Bowser VS Dr. Eggman (Sonic) W
Yoshi VS Chocobo (Final Fantasy) W
Bowser. Jr VS Tron Bonne (Mega Man) W
King K. Rool VS Gruntilda (Banjo-Kazooie) W
Daisy VS Blaze (Sonic) L
Rosalina VS Palutena (Kid Icuras) W

Total: 8 wins and 3 loses

Characters preferred opponents W-L-D
Sonic VS Mario (Nintendo) W
Tails VS Luigi (Mario) L
Shadow VS Mewtwo (Pokémon) W
Dr. Eggman VS Bowser (Mario) L
Silver VS Trunks (Dragon Ball) W
Knuckles VS Donkey Kong (Mario) L
Blaze VS Daisy (Mario) W
Dr. Eggman VS Bowser (Mario) L
Amy VS Sakura (Naruto) W
Metal Sonic VS Bass (Mega Man) W
Dr. Eggman Nega VS Lord Wily (Mega Man) W

Total: 7 wins and 4 loses

Characters preferred opponents W-L-D
Mega Man VS Astro Boy (Astro Boy) W
Proto Man VS Copen (Azure Striker Gunvolt) W
Bass VS Metal Sonic (Sonic) L
Dr. Wily VS Dr. Eggman (Sonic) L
Mega Man X VS Optimus Primal (Transfromers) L
Zero VS Shadow (Sonic) L
Axl VS Roxas (Kingdom Hearts) L
Sigma VS Ultron (Marvel) L
Omega VS Galacta Knight (Kirby) L
Mega Man Volnutt VS Quote (Cave Story) W
Tron Bonne VS Bowser. Jr (Mario) L
MegaMan.EXE VS Nahobino (Shin Megami Tensei) L
Lord Wily VS Dr. Eggman Nega (Sonic) L
Star Force Mega Man VS Blue Beetle (DC) L
Vent VS Troy Burrows (Power Rangers) W

Total: 4 wins, 11 loses

Characters preferred opponents W-L-D
Sora VS Link (Zelda) W
Riku VS Meta Knight (Kirby) L
Kairi VS Asuna (Sword Art Online) W
Roxas VS Axl (Mega Man) W
Xion VS Nier (Nier Replicant) W
Axel VS Renji (Bleach) W
Aqua VS Jeanne d'Arc (Fate) W
Terra VS Richter (Castlevania) W
Ventus VS Pyrrha (Soul) W
King Mickey VS Yoda (Star Wars) W
Xehanort VS Palpatine (Star Wars) W
Vanitas VS Baby (Dragon Ball) W
Xemnas VS Pain (Naruto) W

Total: 12 wins, 1 lose

Characters preferred opponents W-L-D
Kirby VS Majin Buu (Dragon Ball) W
King Dedede VS Wario (Mario) W
Meta Knight VS Riku (Kingdom Hearts) W
Gooey VS Yoshi (Mario) W
Bandana Dee VS Hero Prinny (Disgaea) W
Galacta Knight VS Omega (Mega Man) W

Total: 6 wins, 0 loses