Similarly to "Pocket Monsters 2 (Unl)", "Pokemon II" on Sega Genesis is not an official release. It's likely a fan-made port or a heavily modified ROM of the Game Boy game Pokemon Red or Blue. The gameplay would mirror the original Game Boy experience but potentially with visual or gameplay changes to adapt to the Genesis's capabilities. No official company is credited with this unofficial release.

Pokemon II

Pocahontas (USA)