On this cartridge, it features 20 GBA games and 260 NES games.
The NES games from numbers 95 - 184 don't boot. (There's also a repeat of one of the games - Iron Tanks - Not that it makes much difference with the huge variety on offer in one single cartridge for this low price)
All other games work great.
Includes a saving function for the GBA games.
An optional custom cassette-style case can also be included.