That definitely uses the same sound engine as Hot Dance 2000 and all of those other ones. Not sure if you noticed but it also seems to run on the OneBus technology.
Also, how the hell is anyone supposed to play Tetris on a dance mat? XD
Edit: Looking at those some more some of the sound effects on DDR Disney Mix are the same ones that are used in Nice Code's horrible games. And if the copyright on the title screen says 2001, then that'd mean that the OneBus technology existed by then.
Oh, and if those songs are officially licensed then aren't some of those DDR things actually legal? :|
BTW, nice to see a remake of Take on Me that sucks less than the one on Beat @ Box.
Edit 2: I was just looking around on eBay for TV games and I stumbled on
this, I might be wrong but this seems to be another variation of these things. What tips me off is that it lists "Pinball game" among the 3 games in 1 list, which I'm pretty sure is the Nintendo game. Curious as to what that "Knock Out" game is though; Mike Tyson's Punchout or one of those awful boxing games like on the 8-bit Vii? Then again, it's probably that whack-a-mole game that's on
Hot Dance 2000. (Which is actually a hack of Hit Marmot by NTDEC)
Also, I like how the last two songs are Christmas songs, which is odd for a DDR clone methinks.