Super Mario Bros. 3 Ridley X Hack 6 is a ROM Hack of Super Mario Bros. 3 with a new item slot feature.
In the speedrun, I press the select button to use the item slot while running so the p-meter increases. I won't have to use the slow and steady technique now that the item slot feature is there. You're usually supposed to find the bomb somewhere so you can enter the pipe before the final castle and then defeat Roy in the small castle but instead I managed to beat it in the fastest way possible. Also, 1-5 was tough for me to speedrun because in the original TAS by Mizumaririn, they just clip through the pipe and I tried to do that too but it didn't work so yeah.
DrD2k9: I'm by no means an expert on the SMB3 game engine, so there are definitely things I don't understand wit this run.
While I can see the benefits of the hammer bros and fire flower suits, I
still have some curiosities regarding whether or not having/obtaing a flight capable suit would speed up some areas of this run; espcially considering the minimal distance needed to max out the P-meter for flight. The Tanooki suit would yield the flight capability as well as the ability to "stomp" firebars/flamethrowers of which are waited on in parts of this run.
There are also a few places where it seems clipping through walls should be faster than the route/method used in this run (for example, around frame 100780).
All that said, without exhaustive testing, I can't claim that the route or strategies used in this run is sub-optimal. So while I anticipate improvements may still be possible, accepting.