Tetris and Dr. Mario 
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Tetris
6DB4-1F65       Level never increasesDFB4-1405       After the first level your level increases every lineCBB7-C460 + D4B7-C4A0 + DDB7-C7D0       The same peice always dropsCBB2-3DA9  + DCB2-3FD9 + 3CB2-3F09      Always at high speed
Dr. Mario
CBC9-4466 + DCC9-44A6 + 3CC9-47D6       The same peice always drops-until you hit the change buttonCB67-37DC + DC67-370C + 3C67-376C       The same peice always drops