So, I didn't find any posts nor guides about this. I'm running any% and, sometimes, I lose my propeller suit in world 5 before 5-T or (most important) before 5-4 and the skip saves so much time. Is there any document that shows the location of every propeller suit, location of "?" Blocks and it's contents or location of every single power-up

(If there is none, is someone who wants to join me to create it? This can help lots of new runners)

You can always go back to 1-1, but there are backups in 5-3 and 8-A, as well as the one in the middle of escape in 8-C.

Where is located the 5-3 backup? (I hate this level and it's precise timing)

there's a pipe somewhat close to the beginning of 5-3 that has a roulette block with a prop in it. if you're struggling to grab it, watch how the cannonless wr does the 5-3 prop grab.

tbh we should update all the main category guides with backup powerups to make them more accessible to players who aren't nearly as familiar with the game

For any% at least id say the only useful backups are if they get hit after grabbing prop back in 8-A and have to grab the one before where we normally do cannonball triple, and the one in escape. The other one in 8-A is awkward to grab, and the red coin ring one is super slow. As for 5-3, chances are a new runner wouldn’t make it through the level without getting hit unless they learned some movement for it.