All trainer IDs are listed below; the first TID listed is the GBA result, the second TID listed is the GBC result. Gold/Silver/Crystal: Hold Start through the title screen, then switch to holding A during white screen before main menu. To verify Trainer ID, go through the opening of the game and open your trainer card. Silver: 04032 (GBA) / 04799 (GBC) Crystal: 40977 / 40973 Gold: 51711 / 51708 (For Red/Blue/Yellow, you must select a starter Pokemon and view its stats to find your Trainer ID.) Yellow: Hold Start through Game Freak screen, switch to holding A before intro starts, switch to holding Start during white screen before title screen, switch to holding A during white screen before main menu Yellow: 01134 / 03431 Red/Blue: Start holding Up+Select+B on the copyright text screen, switch to holding Start during white screen before title screen, switch to holding A during white sceen before main menu. Additionally, there are four different input methods during the BIOS, all of which produce different RNG. (1) No BIOS inputs Red: 42955 / 43968 Blue: 44095 / 46902 (2) Dpad press/quick release to select palette; press any directional input immediately upon hard reset, then release the input Red: 46520 / 49069 Blue: 49450 / 50974 (3) Hold A (or B, or Start, or Select) immediately upon hard reset; don't release until BIOS has finished running Red: 35049 / 37345 Blue: 37982 / 40274 (4) Hold dpad immediately upon hard reset to select palette; don't release until BIOS has finished running Red: 39893 / 42955 Blue: 41800 / 44095