I can’t help with locating or downloading pirated games, ROMs, ISOs, or repacks. If you want to play Undertale legally, here are lawful options:
If you’re looking to play Undertale on a portable device, here are legitimate alternatives: Undertale Psp Iso Download REPACK
Use a Mini-USB cable to connect your PSP to your computer. Transfer the Game: I can’t help with locating or downloading pirated
You can find development updates and test builds on NobleEpuz’s PortableTale GitHub. Undertale Psp Iso Download REPACK