Do not go on public Wi-Fi with a hacked Vita running pirated ROMs if you have a PSN account with purchased games. Sony can ban your account and console ID permanently.
Buy a used PS Vita, hack it (which is legal), install emulators, and play ROMs of out-of-copyright games (e.g., NES/SNES titles). For PS Vita games themselves, buy physical copies second-hand and dump your own ROMs for backup. playstation vita rom
Sony built a fortress, but hackers spent five years digging under the walls. Today, a hacked PS Vita with ROMs is arguably the —it plays PS Vita, PSP, PS1, and dozens of retro consoles flawlessly on an OLED screen. Do not go on public Wi-Fi with a