Xbox updating libraries
Game Boy Advance homebrew developers have several ways to use GBA flash cartridges in this regard.
Along with the Dreamcast, Game Boy Advance, and Play Station Portable, the most frequently used platforms for homebrew development are older generations of consoles, among them the Atari 2600 and Nintendo Entertainment System (NES).
Keep in mind that users can change the experience in specific libraries or sites back to new if they choose. Efforts have been made to use actual console hardware for many older systems, though.