Nihil/guide

Fox
Go west and warp to Lake World. Take the boat south and east until you reach the bottom of a large island filled with trees. Enter between the gap in the trees. In the next area, head north and enter the log cabin. Interact with the fox pelt.

Dreamcatcher
Go east and warp to Totem World. Head northeast while avoiding the Noppera (you may wish to use the Fox Effect to make this easier), and enter the teepee. Interact with the dream-catcher.

Wings
Go northwest and warp to Crystal Tree World. Head southwest and ascend the green flight of stairs. Enter the building. Take the middle path on your left. Interact with the floating cluster of crystals.

Monochrome
Go south and warp to Game & Watch World. Head northwest and enter the house. Continue right past the burning building and enter through the next open doorway you reach. Interact with the handheld console.

Maple Syrup
Go northeast and warp to Autumn World. Head west, south, west again, then up between an opening in the trees. Interact with orange blob.

Noppera
(The Match and Wings Effects are required and recommended, respectively.) Go northwest and warp to Crystal Tree World. Head southwest and ascend the green flight of stairs. Enter the building. Take the topmost path on your right, then take the stairs and descend the darkened staircase. Equip and use the Match Effect before continuing down. In the next area, go southeast. Pass through the oval between two circles which otherwise look like two eyes and a mouth. Immediately equip and activate the Wings Effect upon entering the next area to stop the Noppera throughout. Navigate through the maze until you reach a black platform. Interact with the Noppera head propped up on a pole.

Rain Mask
(The Match Effect is required.) Go south and warp to Game & Watch World. Head north and enter the opening in the grove of trees. Continue north and fall down a hole. Carry on right until Yorutsuki is facing north, then equip the Match Effect. Go up until you see a red-orange path to your left, follow it to the Cryptic Tiles Maze. Navigate your way north and east to a down staircase somewhere in the middle of the maze. Interact with the rain mask.

Match
Go southwest and warp to Notebook World. Head south and west a bit to a black dot with the word "way" above it. While standing upon it press the Z key to be teleported to a burning area. Interact with the match in the center.

Lab Coat
Go northeast and warp to Autumn World. Head west and head towards a small hut found in a path in the trees. Talk to the character in the hut before leaving. Go north and left a bit and climb up the towering stalk. Continue climbing up and left until you reach the next area. Enter the automatic door. Interact with the lab coat hanging on the wall.

Planet
(The Lab Coat Effect is required.) Go north and warp to Chess World. Head northeast and cross a black-and-white tile between two pieces. Go around and out along the path to Go World. Head south and east down a square hole. Navigate through the next area to the rafters above the entrance platform. Enter the train and head left to a dark red locked door.

OR

Go west and warp to Lake World. Take the boat east and jump into the depression in the center of the island. While avoiding the Noppera, make your way to a rusty U-shaped pipe. Go through it and south along the path. In the next area, head up and enter the train and go right to a dark red locked door.

Equip the Lab Coat Effect to unlock it. In the next area, take the second staircase from the right and enter the spaceship. Inside, interact with one of the two levers and wait a few minutes until the craft comes to a stop. Continue right across the surface of the moon to a building. Inside, interact with the floating ring off the edge of the platform.

Demon
Go northeast and warp to Autumn World. Head west and north and head towards a small hut found in a path in the trees. Sleep in the bed to the right. Go south, then north and a bit west through a path flanked by trees. Navigate north across the icy path, then carry on. In the next area, head south and west and enter church. Carry on to the back of the main corridor and enter the last room on the right. Interact with the glowing upside-down cross.

Fish
(The Maple Syrup Effect is required.) Go east and warp to Totem World. Find the teepee with a passage through the back. Once outside, go left. Head north to the seemingly endless path. Walk forward and then head backwards, then forward again until the scenery changes. In the next area, go right to the end of the road, then go up. Jump off the pier straight ahead. Go west and find the underwater villa; use the Maple Syrup Effect to transform into a blob and enter the squat building with a square entryway. Interact with the floating card.

Jester
(The Match Effect is required.) Go south and warp to Game & Watch World. Head north and enter the opening in the grove of trees. Continue north and fall down a hole. Carry on right until Yorutsuki is facing north, then equip the Match Effect. Go up and right across the path. Follow the path until you reach a fork; go north into a building. Pass through the central area and interact with the window at the end. Find and step on the red Joker card. Go north and interact with the mirror.

Hanging Rope
Go west and warp to Lake World. Take the boat east and jump into the depression in the center of the island. While avoiding the Noppera, make your way to a rusty U-shaped pipe. Go through it and south along the path. In the next area, head northeast and pass between two claws. Enter the rusted ship ahead. When you reach a fork, go left, and follow the path north. Climb the chain in the upper corner of the room. Interact with the hanging body.

Reaper
(The Hanging Rope or Cloud Effect is required.) Follow the directions to the Hanging Rope Effect, but go up at the fork instead. Follow the path until you reach a room with another large chain, and head left. Head left at the next fork and use the Hanging Rope or Cloud Effect to cross the gap and enter the hole. Navigate the maze to a dead-end space with a square in center. Step into the square and press Z to warp to the next area.

Continue straight ahead. At the final platform, step on the white circle. Head southwest and step inside a black hole. Follow the stone path left until the path doubles up and goes north; continue left and pass between two columns of gravestones nearby. Carry on north and approach the grim reaper.

Hole
Follow the directions to the Fish Effect, but instead of heading into the squat building, find and enter the building at the top with the double entrance. In the next area, search for another entryway much like the one you entered from: inside, interact with the square to be teleported to the interior of another building. Exit into the Demon Capital and go north and cross a boardwalk to a roof area. Continue up and past the trees into the Hand Settlement. Find the topmost dwelling on the right of the map and enter it. Carry on along the path. Interact with the hand-like object sticking out of the ground.

OR

Go east and warp to Totem World. While avoiding the Noppera, locate the teepee that leads to the forest. Take the right path and head up past the totem. Carry on north until you reach the roof--once there, walk around the perimeter to the north exit. Continue up and past the trees into the Hand Settlement. Find the topmost dwelling on the right of the map and enter it. Carry on along the path. Interact with the hand-like object sticking out of the ground.

Abstract
(The Wings Effect is highly recommended, if not required.) Follow the directions to the Fish Effect, but instead of heading into the squat building, find and enter the building at the top with the double entrance. In the next area, search for another castle-like entryway. Continue through the next few areas until you reach a barren wasteland. Walk to the other end and find a small square exit surrounded by mounds. Navigate your way through the white paths to a yellow exit. Head to the left to the edge of the purple area and locate a bridge. Carry on along the bridges and across the islands to the uppermost ridge of the map. In the next area, equip the Wings Effect and activate it to freeze the Noppera throughout the purple maze. Make your way up to an exit at the top, then interact with the purple mushroom.

Exit into the Fungi Forest and search for a multicolored mushroom. Interacting with it will warp you to a psychedelic world. Locate the checkered patch on the ground and step on it. Interact with the brilliant starburst at the end of the path.

Cloud
(The other seventeen Effects are required.) Follow the directions to the Planet Effect, but take the first staircase nearest the train instead. Use the Lab Coat Effect to enter a smaller spaceship and interact with the single lever at the front. Wait a few minutes until the craft comes to a stop. Exit south to the Cryptic Tiles Maze. Somewhere to the left is a second staircase. In the next area, you will encounter rooms which require a specific effect to successfully clear. Once you've crossed all the rooms, follow the stairs and interact with the cloud on the landing.