Snake Eyes:
1985 Cartoons
Renegades Cartoon
Resolute Cartoon
Marvels Comics
Image Comics
IDW Comics
Shredder:
1987 Cartoons
2003 Cartoon (Utrom Shredder)
Nickelodeon Cartoon
Mirage Comics (Pre Shark)
Archie Comics
IDW Comics
Rules:
To the Death.
Snake Eyes has his Swords, Armor, Shurikens, and Smoke Grenades
Shredder has his Claws, Armor, Shurikens, and Smoke Bombs
Both start 10 feet apart and battle in a forest under the moonlight here.
Leaning towards Shredder personally...
Leaning towards Snake Eyes.