Sonic the Hedgehog (series)/Yu-Gi-Oh

VERSION 1:

Sonic as Yugi

Classic Sonic as Little Yugi

Amy as Tea

Tails as Tristan

Knuckles as Joey

Eggman as Seto Kaiba

Metal Sonic as Mokuba

Shadow as Pegasus

Rouge as Bakura

Satam Dr. Robotnik as Zorc

Silver as Marik

Erazor as Dartz

Zavok as Gozaburo Kaiba

Mecha Sonic as Noah Kaiba

Blaze as Mai Valentine

Orbot and Cubot as Rex and Weevil

Jet as Ushio