Been awhile since I PR'ed in this game, but I have been unsuccessful at getting one in SMK lately.
CL - 50"33 (17"41 / 16"42 / 16"50)
Non-ZZMT
Great double jumps in all three laps, the tightness of the drift beforehand is surprisingly important as well as the timing of the MT release which can make you come up short or overshoot the second jump pad.
Only gains one place (and one standard) but at last I've gotten a PR in something other than SMK, for the first time in at least a year.
I was having trouble with my DS's R button until I shimmed it a bit with a knife blade. (My second DS, at that) This might be only a temporary fix; I still want to get a cheap GBA I can mod for ZZMT, something I've put off for way too long. I'm also getting another copy of MKDS, whether I can really afford one or not. Got fed up with it either not loading, or chucking my save data. So I chucked
it.

I've had lots of problems with my handheld games like this, I think I'm letting too much dust and stuff get into them! I've already replaced my SML2 once, and Zelda: Link's Awakening
twice. My Kirby 2 and DK Land 100% files have bought the farm (even if the games haven't... yet), so I imagine it's a matter of "when" something like this will happen on my MKSC too. Just more incentive to go all-out and make the switch to ZZMT...