To use the games download the gameboy emulator (game boy on the PC) you need and run it then browse for where you downloaded the game to (Some are zip files so you will need to decompress them) 

Download Gameboy emulator for WIN9x/WinNT/WIN200 

Download Gameboy Emulator for BEOSx

Download Gameboy emulator for DOS 

Download Gameboy emulator for MacOS

Download 1 2 3 Gameboy emulator for MacOS tools 

English Games

Download Pokemon RED in full English

Download Pokemon BLUE in full English

Download Pokemon YELLOW in full English

Download Pokemon PINBALL in full English

Mainly English Games

Download Pokemon GOLD

Download Pokemon SILVER (Sorry Not working)

Download Pokemon CARD GAME

Download Pokemon GREEN

Japanese Games

Download Pokemon COLOUR