Matchups:

* Sonic VS Optimus Prime (Transformers Unicron Trilogy)
* Tails VS Coco (Crash Bandicoot)
* Knuckles VS Terrafin (Skylanders)
* Dr. Eggman VS Kaos (Skylanders)
* Metal Sonic VS Copy X (Mega Man)
* Rouge VS Sly Cooper (...)
* Blaze VS Starfire (DC)
* Team Chaotix VS Cunning Hares (Zenless Zone Zero)
* Omega VS Robo (Chrono Trigger)
* Gamma VS Bastion (Overwatch)
* Chaos VS Kyogre (Pokemon)
* Emerl VS Rogue (Mega Man)
* Black Doom VS Wizeman the Wicked (NiGHTS)
* Jet VS Nitros Oxide (Crash Bandicoot)
* Mephiles VS Cetrion (Mortal Kombat)
* Iblis VS Hirudegarn (Dragon Ball)
* Captain Whisker VS Sky Byte (Transformers)
* Erazor Djinn VS Master Logos (Kamen Rider)
* Merlina VS Count Bleck (Super Mario)
* Zavok VS Golden Queen (Skylanders)
* Infinite VS The Merciless (DC)
* Sage VS Susie (Kirby)
* The End VS Void Termina (Kirby)
* Tangle VS Kamala Khan (Marvel)
* Whisper VS Xiao (Genshin Impact)
* Mimic VS Chameleon (Marvel)
* Metal Virus VS Nightmare Virus (Mega Man)
* Mecha Sonic VS Chasm (Marvel)
* Dr. Starline VS Hobgoblin (Marvel)
* Surge VS Albedo (Ben 10)

Honorable Mentions:

* Sonic VS Mario 3
* Tails VS Bumblebee (Transformers)
* Knuckles VS Piccolo (Dragon Ball)
* Amy VS Sakura (Naruto)
* Metal Sonic VS Mercurymon (Digimon) / Cell (Dragon Ball)
* Blaze VS Rivet (Ratchet & Clank)
* Vector VS Brok (Brok the InvestiGator)
* Espio VS Greninja (Pokemon)
* Charmy VS Vi (Bug Fables)
* Black Doom VS Raven Beak (Metroid)
* Mephiles VS Vaati (The Legend of Zelda) / Dimentio (Super Mario)
* Deadly Six VS Koopalings (Super Mario)
* Infinite VS Gas (Dragon Ball) / Skull Kid (The Legend of Zelda)
* The End VS Fecto Elfilis (Kirby) / Reclusa (Super Mario)
* Dr. Starline VS Starscream (Transformers: Cyberverse)
* Surge VS Bass (Mega Man)
* Hard-Boiled Heavies VS Bomber Kings (Bomberman)
* Sticks VS Cham Cham (Samurai Shodown)
* Fang VS Dingodile (Crash Bandicoot)
* King Arthur VS Leongar (Kirby)
* Bean the Dynamite VS Boomer (Skylanders)
* Titans VS Divine Beasts (The Legend of Zelda)

A chart full of my favorite Sonic MUS