Sonic, Pac-Man cross over to each other's mobile apps - Polygon

Why has there never been a real Mario and Sonic crossover game (platformer)? - Quora

Sonic and PAC-MAN team up for epic iOS/Android crossover, available now

Sonic Dash Sonic VS Pac-Man Gameplay (iOS, Android) Part 1

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Sonic, Pac-Man cross over to each other's mobile apps - Polygon

Sonic the Hedgehog' – Sega Returns! – TouchArcade

Sonic the Hedgehog' – Sega Returns! – TouchArcade

Download - Defunct Games

Sonic, Pac-Man cross over to each other's mobile apps - Polygon