They seized a bunch of Linux devices with retroarch and roms that were probably actually worth a couple hundred thousand at market prices for these devices. You can get a handheld thing for under $40-50 on aliexpress and it comes filled with hundreds or thousands of roms and rom hacks.

The GBA Pokémon games are great, my 8yo loves them.

Harvest moon series is also a good bet.

Kirby games

Yoshi’s island on snes

Get it from Amazon if you are going to buy one. Anbernic is in China so their customer support on a $70-80 device is barebones to non existent.