All untested probably work but unsure
eBay
Practical Home Wall Travel Charger AC Adapter For GBC Game Boy Color console Power Supply Charging Cable EU/US Plug
Aliexpress UK
Nintendo Game Boy Advance Color AC Adapter – Intec Interact | New | Free UK P&P This Nintendo Game Boy Advance AC adapter by Intec/Interact is brand new and unused in its original case. Please note, the plastic packaging has a few splits, but the item itself is in new condition. Kindly review all photos carefully for a detailed view of the item's condition. If you have any questions, feel free to message us.
eBay
AC Adapter for Nintendo DS and GameBoy Advance SP Systems Power Charger, Wall Travel Power Charging Cable 5.2V 450mA for GBA SP
Aliexpress UK
Why Buy This Adapter: Whether you’re replacing a faulty unit or need an extra adapter for convenience, this item provides a cost-effective solution for all your portable gaming needs.
eBay
NEW 5.2V Home Wall Travel Charger AC Adapter For Nintend DS NDS GBA SP Gameboy Advance SP Power Supply Charging Cable EU US Plug
Aliexpress UK
Not for GBA console. Advanced charging technology is adopted to greatly improve charging efficiency while ensuring safety. 【Portable】 Use new technology which is different from the original. The design is exquisite and easy to carry.
eBay
NEW 5.2V Home Wall Travel Charger AC Adapter For Nintend DS NDS GBA SP Gameboy Advance SP Power Supply Charging Cable EU US Plug
Aliexpress UK
+ Works a treat! ^_^ gilebai (91 ). 3jrlg (329 ). Multi-region Dreamcast consoles. huxter2005 (71 ). keefjohno (216 ). + Great item, works perfectly. Quick dispatch.
eBay
NEW 5.2V Home Wall Travel Charger AC Adapter For Nintend DS NDS GBA SP Gameboy Advance SP Power Supply Charging Cable EU US Plug
Aliexpress UK
Listing for a nintendo gameboy color & pocket mains power adapter. This can be used to power a gameboy color or pocket console, with mains power rather than batteries. IT DOES NOT CHARGE THE CONSOLE, it has to be plugged in at all times to power the console. The cable is around 2 metres or so long. Great for saving on batteries, and can be used to power consoles with corroded battery contacts. Good condition, with a few marks/imperfections, nothing substantial. CONSOLES SHOWN IN PHOTOS ARE NOT INCLUDED, they have just been used to show it working. Please check my other listings :)
eBay
NEW 5.2V Home Wall Travel Charger AC Adapter For Nintend DS NDS GBA SP Gameboy Advance SP Power Supply Charging Cable EU US Plug
Aliexpress UK
AS-DC ADAPTER STILL IN BAGGIES. THE ADAPTER BOX IS A LITTLE WORN ON 1 END.
eBay
1PC For EU Plug Nintendo DS NDS GBA SP Gameboy Advance SP Home Wall Travel Charger AC Adapter 1.2 Meter USB Cable
Aliexpress UK
Not for GBA console. Advanced charging technology is adopted to greatly improve charging efficiency while ensuring safety. 【Portable】 Use new technology which is different from the original. The design is exquisite and easy to carry.
eBay
1PC For EU Plug Nintendo DS NDS GBA SP Gameboy Advance SP Home Wall Travel Charger AC Adapter 1.2 Meter USB Cable
Aliexpress UK