.B.P./guide

Cap / (キャップ)
Enter the Streetlight World. Go down a bit and right from the door. Enter the building. Keep going right until you're in a room with a one-eyed monster in it. Interact with the monster to get the effect.

Torso / ( トルソー)
Enter the Mannequin World. Go right a bit and down from the door to some headless mannequins. Interact with the mannequin being held up by a pole in its back.

Bar / (バール)
Enter the Streetlight World. Go north from the building that you'd find the Cap effect in. Interact with the bloody bar in the ground.

Flat / (フラット)
Enter the Red Maze. Go south-west corner and enter the door with graffiti over it. Go right to the Underground Tunnel. Go up twice and interact with the featureless sign.

Mountain Bike / (マウンテンバイク)
Enter the Stagelight World. Go south-east and find/interact with the mountain bike.

Mask / (マスク)
Enter the Mannequin World. Go left and down from the door. Interact with the front of two bright green pillars. Go down and left. Go down the bottom path (avoid the chaser). Interact with the pool of water.

Go left and interact with the flag. Go down and interact with the flag. Go up a bit and right, interact with the flag in the water. Interact with the mask on the ground.