GBA:Connector Pinouts

Cartridge
Pins are numbered left to right, cartridge label up. There is a switch in the cartridge slot used to differentiate between DMG/CGB and AGB cartridges. When the switch is activated, the pinout is the same as the Game Boy.

GBA SP Power / Headphone Connector
The GBA SP uses a connector which combines power delivery and audio output.

Micro
The Game Boy Advance Micro uses a single connector for both power and link cable.