Played on an original DS, captured with: 3dscapture.com/ds/order.html

Very, very good run. RNG was about as good as I could ask for, and the only big execution mistakes were ~45 seconds in 5Ghost House and ~23 seconds in 87, with a few smaller mistakes scattered around.

Throughout the run, you'll see me jumping around a lot and bouncing off enemies while in the shell. Normal running speed is 3.0 pixels/frame and sliding in the shell is 2.75 px/fr (~8% slower), so I try to stay out of the shell as much as possible to go fast. Bouncing on enemies is one way to stay out of the shell, but there is also a glitch(?) I use to stay at full speed: if you jump within the first few frames of landing on the ground, Mario does a double/triple jump and stays at full speed. Good example of both of these at 15:45 to 15:55.

Comments on the run:

11: did blue blue shell rng manip (shoutout to koffingrockz!):    • Blue Shell Manipulation Guide  
12: could have been faster, but 354 is still good
1T: this level is cycle based, and I did the "fast cycle". It's possible to go one cycle faster, called the "TAS cycle", but I don't attempt that on runs that get the shell in 12. Here's what it looks like:   / 97310940  
51: no mistakes
52: no mistakes
53: no mistakes
5GH: big mistake. You can't grab onto a vine while moving upward, and I whiffed it pretty hard
81: no mistakes
82: got the awesome trick in the second room where you can hit the switch without stopping. Unfortunately the water strider guy trolled me in the next room, had to slow down a bit
8T1: got a bad pixel stop, just barely made the cycle. Rest of the level was good
83: bad pipe entrance at the end, doesn't lose much time though
84: no mistakes
8C: no mistakes
85: no mistakes
86: no mistakes. Sorry the video was laggy watch 86 in my old pb if you want to see how it's done
87: missed the second koopa bounce, lost 23 seconds. Rest was fine
88: no mistakes
8T2: no mistakes. Did the autoscroller skip which only saves ~8 seconds
8BC: very happy I only lost 0.3 seconds; the BC in my old pb was pretty much perfect