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Power Joy Supermax (30-in-1)

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Title Screen

Power Joy Supermax (30-in-1)

Developers: Various
Publisher: Trump Grand Manufacturing
Platforms: Unlicensed NES, Plug & Play


MinigameIcon.png This game has unused modes / minigames.
GraphicsIcon.png This game has unused graphics.


One of several follow-up systems to the Power Joy, now featuring Nice Code games instead of blatantly stolen Famicom titles.

Unused Intellivision Hacks

Pj-supermax-unused-intv-1.png Pj-supermax-unused-intv-2.png Pj-supermax-unused-intv-3.png

The full data for Airial Hero, Devildom Doom, and Dune War are at addresses 318010, 32C010, and 338010. They are hacks of the licensed Intellivision plug & play ports of Hover Force, Night Stalker, and Space Hawk, respectively. All three games are completely unused in the menu.

Extra Pet 4 in 1 Games

This system features a hack of Pokémon 4 in 1 titled "Pet 4 in 1", changing the graphics of all four games. Two games from it (Pet Dance and Pet Slot) are linked from menu slots, but the other two (Pet Click and Bean) are not. Despite not being listed in the menu, the latter two games can quite easily be accessed by simply pressing B on Pet Dance's title screen.