Highly regarded for carrying fan translations and homebrew "EBOOT" versions of games that never made it to the PSP officially [2].
There are homebrew projects that attempt to run Undertale on , but:
That being said, I can offer some insights on the topic:
If you are looking for high-quality RPGs actually designed for the PSP, these titles are frequently ranked at the top of the system's library: Shin Megami Tensei: Persona 3 Portable
: Navigate to PSP -> GAME on your memory stick.
While an Undertale PSP ISO download may seem appealing to some fans, it's crucial to consider the risks and consequences associated with downloading and playing unofficial copies of the game. Instead, fans can opt for official releases on other platforms or explore alternative portable options.