Though it might look cool, you probably shouldn't get PSP games on your Wii U. Jetpack Joyride crashes sometimes, LBP refuses to boot, and 2D Octopus has glitchy sprites (Upscaling the games is a great feature, though)
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It also requires tiramisu/haxchi loaded to work properly, without it, the app crashes when a game is loaded If you were wondering, I'm using Wii U Shell to view these files.