try speedrunning individual levels before the entire game. you can use the ingame replay feature to save records incase you dont have a camera with you.

in some areas where you fall down you can mash to go faster as those areas are programmed the same way as little tunnels you dash trough.

avoid rng as mutch as possible, jumping over that moja high may lose time but being attacked by it kills your run.

buibui planes are a joke. jump right trough em! those bombs wont hit you in a milion years unless you try to get hit. The ones with 3 buibui are easy as heck to defeat too but as they take 3 hits its usually better to ignore them and just move along if possible.

learn any tech about your level that might help you run it before running in a slower playtrough. this game is criminally underplayed and glitches/exploits are everywhere!

change up your hat/locoroco color in between runs from time to time so you wont grow sick of a samey song.

use the old psp model as it has the best shoulder triggers and a bigger grip. if you play locoroco a lot its very worth the slightly slanted square button.

there are ways to attach your psp to component cables, though as far as i know only newer model psp's fit in it. i reccomend saving a replay of a run on your old model, swapping out the sd card to your newer model psp, then attaching it to component and a capture card for high quality video's (yes i know i havent done it but capture cards are expensive as heck)

play other locoroco games again, to not grow sick of doing the same thing over and over for days on end, and also to understand the tiny bit of lore these games have (98% of which is in 2).