Play Mattel Games on Emulator Online. We have the best Mattel games online for different retro emulators including GBA, Game Boy, SNES, Nintendo and Sega. There are over 1 online Mattel games in our collection. All of the games that you see here are without download, pick any and start playing right away. If you enjoy the game, be sure to vote for it and leave a comment. Mattel games that started it all back in the day are now playable free within your browser!