JRPG Warrior - Final Fantasy Pixel Remaster Series are such a huge downgrade compared to the PSP versions of I, II and IV 😔 HD-2D would be the proper way to go.
PSP downgrade patch released | Eurogamer.net
PSP Hacks [Book]
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
PSP Downgradwer
4 Ways to Downgrade a PSP - wikiHow Fun
Amazon.com: Sony Playstation Portable (PSP) 2000 Series Handheld Gaming Console System (Renewed) (Black) : Video Games
PPSSPP's 1.15 update brings big improvements to the PSP emulator | OC3D News