Square Enix and Namco Bandai vs Capcom and Snk

Square Enix and Namco Bandai vs. Capcom and SNK is the anime series. It is a crossover anime that contained many where Sonic the Hedgehog, Cloud, and Lars summons upon heroes of capcom and snk using chaos emeralds to protect 10-12 year old Christopher Thorndyke and Tifa Lockhart.