It looks like PS4 Parappa Remastered is the PSP game running under

Would you believe that the PlayStation 4 remaster of Parappa the Rapper is actually the PSP version running under emula…

PaRappa the Rapper Remastered Hides a PSP Emulator - Cheat Code Central

PaRappa the Rapper 2 - Metacritic

There's a PSP Emulator Hidden in the PS4 Version of PaRappa the Rapper

PSOne Classics Buyer's Guide -- PS3/PSP Store Apocalypse Edition - Hey Poor Player

PSP Fanboy review: PaRappa the Rapper

PS Plus November 2023 games for Extra and Premium are now available

PaRappa The Rapper 2 - Gameplay Video 1

PS4 remaster of PaRappa the Rapper is in fact PSP emulation with new textures, Page 2

PaRappa the Rapper - Wikipedia

PaRappa the Rapper (1996) PS1 vs PSP vs PS4 (Graphics Comparison)

Review: PaRappa the Rapper Remastered – Destructoid

We're So Happy Parappa The Rapper Is Back To Frustrate Us

PaRappa the Rapper PS4 Runs on PSP Emulator - GameRevolution

PaRappa The Rapper Remastered Review