I've been going at the Grumble Volcano ultra-shortcut for a while now, continuing to try and lower my scores. I've been stuck for a bit now, not really lowering my score, so are there any tips/and or tricks that help? Like a better character-bike/kart combo, etc.

Character & bike I use: Funky Kong and Flame Runner (I use the tactic where you turn at the very beginning and launch yourself onto the rock, not the one where you go into the lava first & get picked up by lakitu)

Daisy is the best character for her weight class, and funky is all round good states. Not too much is different

their stats in detail:

https://www.google.com/search?q=mkwii+character+stats&tbm=isch&ved=2ahUKEwiv8Z_Iu67oAhVb9qwKHTbUA5sQ2-cCegQIABAA&oq=mkwii+character+stats&gs_l=img.3..0.6740.8637..8879...0.0..0.82.724.10......0....1..gws-wiz-img.......0i7i30.RUUb2spg3zg&ei=YY13Xu-8CtvsswW2qI_YCQ&rlz=1CANQDY_enUS817#imgrc=lQTvpZY_Wl63wM