Just tried it with my Supercard CF.
As unfamiliar as the characters are to me, this is a lot of fun.
It reminds me of Diddy Kong Racing but with fruitier characters.
If you're itching for MK DS, play this game to pass the time.
The slowdown can be solved by running the game from the Supercard, not the flash card itself (ie. don't set the option to have 1 second loading) and it plays just fine. Yeah, the text has glitches, but who really cares? We all know it's no Mario Kart, but hell, wait a couple weeks and use this to pass the time.