The GBA library includes a wide range of games across various genres, from iconic Pokémon titles, and Mario Kart: Super Circuit, to more niche and hard-to-find games. Collecting ROMs can be a way for enthusiasts to access and play these games, especially when they are no longer available for purchase or on original hardware.
The mention of "1000 ROMs" suggests a comprehensive collection of games for the GBA. ROMs (Read-Only Memory) are essentially digital copies of games that can be played on an emulator or, in some cases, on the original hardware with the use of flash cartridges.