GameCube – Game Boy Advance link cable - Wikipedia
Nintendo Game Boy Game Boy Color Game Boy Pocket Link - Etsy
Nintendo GameBoy Advance Game Link Cable AGB-005 GBA SP OEM JAPAN OFFICIAL | eBay
Custom Gameboy Link Cable - Etsy
Link Cable Replacement Port for GBC GBP GBL – Retro Game Repair Shop LLC
GENEMA High Quality Cinpel 4 Player Link Cable for Gameboy Advanced SP for GBA GBC SP - Walmart.com
Link Cable For Game Boy Advance / GameCube | Hand Held Legend
Gameboy Color Link Cable for sale | eBay
High Quality 2 Player Link Cable for Game Boy DMG | GBC | GBP | GBL – Retro Game Repair Shop LLC
Backlit Teal Nintendo Gameboy Color GBC Nintendo Adapter Japan - Etsy
Cable | Nintendo GBC GBA GBA-SP | Link Cable
NGC TO GBA Player Link Cable Connect Cord for Nintendo Gameboy Advance to Gamecube Game Boy Advance GBA SP - AliExpress
/i/4942/products/2018-01-25T01%3A28%3A18.655Z-IMG_4077.JPG?1606306133 "Gameboy Color/Advance/SP Link Cable Breakout Board from vaguilar on Tindie")
Gameboy Color/Advance/SP Link Cable Breakout Board from vaguilar on Tindie
Super GameBoy Link Port from qwertymodo on Tindie
Amazon.com: GBA SP Link Cable, 2 Player Game Link Cable Compatible with Nintendo Gameboy Advance SP/Gameboy Advance, 3.9Ft Black : Video Games
GENEMA High Quality Cinpel 4 Player Link Cable for Gameboy Advanced SP for GBA GBC SP - Walmart.com
GENEMA High Quality Cinpel 4 Player Link Cable for Gameboy Advanced SP for GBA GBC SP - Walmart.com
/i/4942/products/2018-01-25T01%3A31%3A15.292Z-IMG_4086.JPG?1606306133 "Gameboy Color/Advance/SP Link Cable Breakout Board from vaguilar on Tindie")
Gameboy Color/Advance/SP Link Cable Breakout Board from vaguilar on Tindie
Gameboy Color/Advance/SP Link Cable Breakout Board from vaguilar on Tindie
Cable | Nintendo GBC GBA GBA-SP | Link Cable
1.8m Link Cable Connect Cord Lead for GC to GB for Gameboy Advance for GBA SP cable - AliExpress
1.8m Link Cable Connect Cord Lead for GC to GB for Gameboy Advance for GBA SP cable - AliExpress
Gameboy Game Link Cable (DMG-04) — Retro Modding
GENEMA High Quality Cinpel 4 Player Link Cable for Gameboy Advanced SP for GBA GBC SP - Walmart.com
2 Player Link Cable Connect Cord Lead Compatible For Nintendo Gameboy Advance GBA SP GBC - AliExpress
I found this crazy link cable setup on Wikipedia: use two GBA cables to link GB/GBC games. : r/Gameboy
