Nostalgia is a Mobile phone emulator that according to the description claims uses the most up-to-date revision of FCEUX. So it's a different emulator from Nestopia.

I know in Bowser's Castle at the small bridge with lava inside the castle, if you fall at just the right angle (fall between the wall and the lava) you clip through the wall, go through the lava and go below the stage, It doesn't really help in any way it just wastes more time. But on Koopa Troopa Beach that hasn't happened to me, but it does happen on other stages,

Thanks, i only asked cause when ever i used a mushroom to go faster, I found on the first lap, the train just was over the track every time, but i think i might have a solution to that, its a theory but i might try using the mushroom on lap 2 or 3 so i don't have to stop.

I have been speedrunning This game for a bit now, I keep finding on Kalimari desert I get to the train when its over the track. I know there is a way to pass through the train itself though the gaps, but I have been having a hard time trying to do that. Is there any way to do this with relative ease or any tips that could help me get though the train if I encounter it during a run that's really good?