some examples of how this rating works, the first letter is for (the shell of the) cartridge, the second is for the label:
Xgames Skateboarding AGB-AXSP-EUR, XXX Activision AGB-AX3P-EUR, Tony Hawk Underground AGB-BTOP-UKV, Trollz Hair Affair! AGB-BT6X-EUR, Sponge+Rugrat+Tak AGB-B44P-EUR, Sudoku Fever AGB-B3ZP-EUR, Robotech Macross Saga AGB-ARBP-EUR, Punch King AGB-APGP-EUR, Tony Hawk 2 AGB-ATHP-EUR, No Rules Get Phat AGB-AGPP-EUR, A/C Treasure Planet Disney's AGB-AZQP-EUR, SpongeBob Unite AGB-BNUP-EUR, Tom and Jerry Magic Ring AGB-ATJP-EUR, Pokémon Mystery Dungeon AGB-B24P-EUR, Shaun Palmer Snowboarder AGB-ASCP-EUR, Super Monley Ball jr. AGB-ALUP-EUR, Nes Classics Pac-Man AGB-FP7P-EUR, Robots AGB-BRTP-EUR, Spongebob Supersponge+Revenge Flying Dutchman, Tom and Jerry Infurnal Escape -AGB-AIFP-EUR, Shark Tale AGB-BSUP-UKV, Over The Hedge AGB-BH5H-HOL, Thunderbirds AGB-BTBP-UKV, Spyro Adventure AGB-AOWP-EUR, A/C Spyro Attack of the Rhynocs AOWE-USA, The Chronicles of Narnia AGB-B2WP-EUR, Spongebob Movie + Freeze F Frenzy AGB-B2BP-EUR, Phantasy Star Collection AGB-AYCP-EUR, Tweety & The Magic Gems AGB-ATMH-HOL, Tweety & The Magic Gems AGB-ATMH-UKV, Pac-man collection AGB-APCE-USA, Peter Pan Disney's AGB-APPE-USA, TCA World Touring Cars AGB-ATQP-EUR, Yu-gi-uh! 7 Trials to Glory AGB-BY7E-USA, Yu-gi-uh! Destiny Board Traveler AGB-BYDE-CAN, Magical Quest 2 Mickey & Minnie AGB-AQME-USA, Shrek 2 + Madagascar AGB-BXHP-UKV, Stormbreaker Alex Rider AGB-BAWE-USA, Manic Miner AGB-A4MP-EUR, Manic Miner AGB-A4MP-EUR, Mijn Dierenpension AGB-BQTX-EUU, Peter Pan Return Neverland Disney's APPP- EUR, Shrek the Third AGB-B3HP-EUR, Spider-man & spiderman 2 AGB-BX3P-EUR, Splinter Cell Pandora Tomorrow AGB-BSLP-EUR, A/C Sonic Advance AGB-ASOP-UKV, PowerPuff GirlsMojo jojo A-Go-Go AGB-APTP-EUR, Tetris Worlds AGB-ATWE-USA-1, X-men 2 Wolverine's Revenge AGB-AWVP-EUR, Quad Desert Fury AGB-BQDE-USA, Namco Museum AGB-ANMP-UKV, Need for Speed Carbin Own the City BN7P-EUR, Winx Club AGB-BWIP-EUR, Spyro Fusion AGB-BSTP-EUR, Pinobee Wings of Adventure AGB-APBP-EUR, Pinobee Wings of Adventure AGB-APBP-EUR(-1), Street Fighter II X Revival AGB-AXRP-EUR, Madagascar AGB-BGZH-HOL, Madagascar AGB-BGZE-USA, Monsters, INC Disney Pixar AGB-AMXE-USA, Monster Force AGB-AM8P-EUR, Monsters en Co + Nemo AGB-BDZH-HOL, Mario Power Tennis AGB-BTMP-EUR, MarioKart Super Circuit AGB-AMKP-EUR, Nes Classics Super Mario Bros AGB-FSMP-EUR, Super Mario Advance (1) AGB-AMAP-EUR(-1), Super Mario World SM Advance 2 AGB-AA2P-EUR, Super Mario World SM Advance 2 AGB-AA2P-EUR, Yoshi's Island SM Advance 3 AGB-A3AP-EUR, Super Mario Bros 3 SM Advance 4 AGB-A4XP-EUR, The Sims 2 Pets AGB-B4OX-EUR, The Sims 2 AGB-B46P-EUR, The Urbz Sims in the City AGB-BOCP-EUR, The Legend of Zelda Link to the Past AZLP-EUR Medabots
A/A Xgames Skateboarding AGB-AXSP-EUR, A/A XXX Activision AGB-AX3P-EUR, A/A Tony Hawk Underground AGB-BTOP-UKV, A/A Trollz Hair Affair! AGB-BT6X-EUR, A/A Sponge+Rugrat+Tak AGB-B44P-EUR, A/A Sudoku Fever AGB-B3ZP-EUR, B/B Robotech Macross Saga AGB-ARBP-EUR, B/B Punch King AGB-APGP-EUR, A/A Tony Hawk 2 AGB-ATHP-EUR, A/C Treasure Planet Disney's AGB-AZQP-EUR, A/A SpongeBob Unite AGB-BNUP-EUR, A/A Tom and Jerry Magic Ring AGB-ATJP-EUR, A/B Pokémon Mystery Dungeon AGB-B24P-EUR, A/A Shaun Palmer Snowboarder AGB-ASCP-EUR, A/A Super Monley Ball jr. AGB-ALUP-EUR, A/A Nes Classics Pac-Man AGB-FP7P-EUR, A/A Robots AGB-BRTP-EUR, A/A Spongebob Supersponge+Revenge Flying Dutchman, A/A Tom and Jerry Infurnal Escape -AGB-AIFP-EUR, A/A Shark Tale AGB-BSUP-UKV, A/A Over The Hedge AGB-BH5H-HOL, B/A Thunderbirds AGB-BTBP-UKV, A/A Spyro Adventure AGB-AOWP-EUR, A/C Spyro Attack of the Rhynocs AOWE-USA, A/A The Chronicles of Narnia AGB-B2WP-EUR, A/A Spongebob Movie + Freeze F Frenzy AGB-B2BP-EUR, B/B Phantasy Star Collection AGB-AYCP-EUR, A/B Tweety & The Magic Gems AGB-ATMH-HOL, B/B Tweety & The Magic Gems AGB-ATMH-UKV, A/A Pac-man collection AGB-APCE-USA, A/A Peter Pan Disney's AGB-APPE-USA, A/A TCA World Touring Cars AGB-ATQP-EUR, A/A Yu-gi-uh! 7 Trials to Glory AGB-BY7E-USA, A/A Yu-gi-uh! Destiny Board Traveler AGB-BYDE-CAN, A/A Magical Quest 2 Mickey & Minnie AGB-AQME-USA, A/A Shrek 2 + Madagascar AGB-BXHP-UKV, A/A Stormbreaker Alex Rider AGB-BAWE-USA, A/A Manic Miner AGB-A4MP-EUR, A/B Manic Miner AGB-A4MP-EUR, A/A Mijn Dierenpension AGB-BQTX-EUU, A/A Peter Pan Return Neverland Disney's APPP- EUR, A/A Shrek the Third AGB-B3HP-EUR, A/A Spider-man & spiderman 2 AGB-BX3P-EUR, A/A Splinter Cell Pandora Tomorrow AGB-BSLP-EUR, A/C Sonic Advance AGB-ASOP-UKV, A/A PowerPuff GirlsMojo jojo A-Go-Go AGB-APTP-EUR, A/A Tetris Worlds AGB-ATWE-USA-1, A/B X-men 2 Wolverine's Revenge AGB-AWVP-EUR, A/A Quad Desert Fury AGB-BQDE-USA, A/A Namco Museum AGB-ANMP-UKV, A/A Winx Club AGB-BWIP-EUR, A/A Spyro Fusion AGB-BSTP-EUR, A/B Pinobee Wings of Adventure AGB-APBP-EUR, A/A Pinobee Wings of Adventure AGB-APBP-EUR(-1), A/A Street Fighter II X Revival AGB-AXRP-EUR, A/A Madagascar AGB-BGZH-HOL, A/A Madagascar AGB-BGZE-USA, A/A Monsters, INC Disney Pixar AGB-AMXE-USA, A/B Monster Force AGB-AM8P-EUR, A/A Monsters en Co + Nemo AGB-BDZH-HOL, A/A Yoshi's Island SM Advance 3 AGB-A3AP-EUR, A/A The Sims 2 Pets AGB-B4OX-EUR, A/A The Sims 2 AGB-B46P-EUR, A/A The Urbz Sims in the City AGB-BOCP-EUR, A/B The Legend of Zelda Link to the Past AZLP-EUR, A/A Need for Speed Underground 2, A/A Need for Speed Carbin Own the City BN7P-EUR, A/B Medabots Rokusho AGB-A9BP-EUR, A/A Mission Impossible Operation Surma AGB-AIHP-EU, A/A Turok Evolution AGB-AT4P-EUR, A/A- Max Payne AGB-BMEP-UKV, A/B No Rules Get Phat AGB-AGPP-EUR, A/A No Rules Get Phat AGB-AGPP-EUR, A/A Super Mario World SM Advance 2 AGB-AA2E-USA, A/B MarioKart Super Circuit AGB-AMKP-EUR, A/A Super Mario World SM Advance 2 AGB-AA2P-EUR, A/A Nes Classics Super Mario Bros AGB-FSMP-EUR, A/B Super Mario Advance (1) AGB-AMAP-EUR(-1), A/A Super Mario Bros 3 SM Advance 4 AGB-A4XP-EUR, A/B Super Mario World SM Advance 2 AGB-AA2P-EUR, A/A Mario Power Tennis AGB-BTMP-EUR