1 use grappling hook item that goes on back then wall jump and before you touch the ground mash shoot and jump facing the ground and you start flying.
2 equip the rocket boots and the paraglider. use them and use left trigger to do a backflip to point upwards and then go to inventory and out really fast then you can use your items again keep doing this and boom your flying.
3 use rino and rocket boots jump teards eall and mash ragdall use jump and rotate. it will take some practice but with this you can go through any wall.
4 equip the hat that spawns the cracken and step to left or right and press use whall still walking that direction its a 50 50 chance it works if it dose you go flying really far.
i know more but havent figured out a way to reliably do them yet