:okay, tetrinet is a clone, for one. if you need a larger list of officially licensed tetris games, try: 
 http://www.gamefaqs.com/search/index.html?game=tetris&x;=0&y;=0 
 they're missing tetris grand master 2, and the not yet released third installment. more info on that can be found at http://www.arika.co.jp/ 
 i'm also pretty sure there was a pokemon variation released for gameboy. i'll search for more sources later.