He means the Pandora. You need to make the Pandora battery and Magic Memory Stick with a homebrew-capable PSP (firmware 1.50 or custom firmware). By 'make', I don't mean a magic battery and memory stick will appear in the PSP after running a special app (though that would be cool); the app will transform a battery into a Pandora and a Memory Stick into a Magic one. Then you can use them to downgrade.

But unless you have a homebrew-capable PSP handy, it would probably be better to buy an older copy of Lumines.

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