Sonic the Hedgehog 2 (Simon Wai prototype) - Sonic Retro

Sonic 2: The Simon Wai Prototype

Sonic the Hedgehog 2 - Wikipedia

Genesis / 32X / SCD - Sonic the Hedgehog 2 - Badniks - The Spriters Resource

Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype/Casino Night Zone - The Cutting Room Floor

Sonic the Hedgehog 2 (Simon Wai prototype)/Comparisons - Sonic Retro

Sonic the Hedgehog 2 (Simon Wai prototype), BootlegGames Wiki

Proto:Sonic the Hedgehog 2 (Genesis)/Simon Wai Prototype - The Cutting Room Floor

Sonic the Hedgehog 2 (Simon Wai Prototype) (GEN) : r/3dsqrcodes

Sonic the Hedgehog 2 (Simon Wai prototype), Sonic Wiki Zone

Play Genesis Sonic the Hedgehog 2 (Aug 21, 1992 prototype) Online in your browser

Sonic the Hedgehog 2 (Simon Wai prototype)/Comparisons/Casino Night Zone - Sonic Retro

Sonic the Hedgehog 2 (Simon Wai prototype), BootlegGames Wiki

Revisiting Simon Wai's Sonic 2 Beta

Sonic the Hedgehog 2 (Simon Wai prototype)/Comparisons/Hidden Palace Zone - Sonic Retro

So about 5 years ago I came across and bought this Sonic 2 Prototype pirated cartridge at a car boot sale for £3. According to sonicretro.org it is highly sought after for