There are 24 effects that the player can find, each of which affects Madotsuki's appearance and often abilities. Very few players achieve the goal of gathering all effects alone, and walkthroughs exist mainly to help find each one.
Effects
Frog
Optional Effect: Madotsuki hops when "1" is pressed
Involuntary Effect: Madotsuki's head becomes that of a frog and she now moves faster in water
Where Found: Forest
Other Uses: None known
Umbrella
Optional Effect: Madotsuki turns the umbrella when "1" is pressed
Involuntary Effect: Madotsuki carries and umbrella. The weather turns rainy, contnuing even when the umbrella is put away (effect must be deliberately removed for this to happen).
Where Found: Puddle World
Other Uses: Puts out a fire that blocks an area
Hat and Scarf
The hat and scarf is exactly as it sounds. However, pressing '1' while it is snowing turns Madotsuki into a snowman and back.
Optional Effect: Madotsuki turns into a snowman when "1" is pressed
Involuntary Effect: Madotsuki wears a hat and scarf
Where Found: Block World
Other Uses: (VERIFY) Interacting with characters wearing a hat and scarf as a snowman will always teleport you back to the original on the return trip.
Yuki-onna
Optional Effect:
Involuntary Effect: Madotsuki turns into a Yuki-onna. It starts to snow, contnuing even when is put away (effect must be deliberately removed for this to happen).
Where Found: Winter World
Other Uses: Puts out a fire that blocks an area.
Knife
Optional Effect: Madotsuki stabs when "Z" is pressed, and switches the hand she is holding the knife in with "1"
Involuntary Effect: Madotsuki carries a knife, causing many characters to run away from her.
Where Found: Dark World
Other Uses: Many characters react in strange ways when stabbed or threatened with the knife.
Medamaude
Optional Effect: Madotsuki is warped back to the Nexus upon pressing "1"
Involuntary Effect: Madotsuki's head turns into a hand.
Where Found:
Other Uses: None known
Fat
Optional Effect: Madotsuki's fat makes a sound when "1" is pressed
Involuntary Effect: Madotsuki turns fat.
Where Found:
Other Uses: None known
Midget
Optional Effect: Pressing "1" causes Madotsuki's number of midgets to increase by 1, and "3" will cause the number of midgets to decrease by 1
Involuntary Effect: Madotsuki turns into a midget.
Where Found:
Other Uses: Entering the hole on Mars
Flute
Optional Effect: Madotsuki plays a tune with a random pitch when "1" is pressed (doing this rapidly makes a melodious song).
Involuntary Effect: Madotsuki holds a flute to her lips
Where Found: The mall.
Other Uses: None known
Neon
Optional Effect: Pressing "1" causes the screen to change colour. This is turned off when Neon is unequipped.
Involuntary Effect: Madotsuki flashes colors. It also looks like you can see her skeleton.
Where Found: Neon World
Other Uses: None known
Nopperabou
Optional Effect: Pressing '1' causes her head to temporarily remove itself from her shoulders and rotate 360 degrees.
Involuntary Effect: Madotsuki loses her facial features with this effect.
Where Found:
Other Uses: None known
Severed Head
Optional Effect:
Involuntary Effect: Madotsuki turns into a severed head, reducing her speed and height.
Where Found:
Other Uses: Somewhere around the Dense Woods, there's a closet. Madotsuki in her normal form blocks the closet even when it's open. Take this how you will.
Towel
Optional Effect: Pressing "1" causes Madotsuki to sneeze
Involuntary Effect: Madotsuki has a towel wrapped around her
Where Found:
Other Uses: None known
Cat
Optional Effect: Madotsuki meows when "1" is pressed, causing NPCs to come near her.
Involuntary Effect: Madotsuki has cat ears and a tail
Where Found:
Other Uses: Causes NPCs to come near her - may be useful in some situations
Lamp
Optional Effect: Pressing "1" make Madotsuki light up, and go dark again.
Involuntary Effect: Madotsuki's head becomes a lamp
Where Found:
Other Uses: Many areas in darkness can be lit up with the lamp effect, e.g. Dark World
Bicycle
Optional Effect: Madotsuki sounds a bell when "1" is pressed.
Involuntary Effect: Madotsuki rides a bicycle and her speed is dramatically increased
Where Found:
Other Uses: Apart from those who use the Speed Glitch, the Bicycle is a staple effect in the arsenal of any player.
Long Hair
Optional Effect: Madotsuki sits down when "1" is pressed (which is what happens when no effect is equipped)
Involuntary Effect: Madotsuki's hair becomes longer
Where Found:
Other Uses: None known
Poop Hair
Optional Effect: Pressing "1" drops a fly
Involuntary Effect: Madotsuki's hair is now poop
Where Found:
Other Uses: Flies can be used as markers to prevent getting lost - they persist through effect changes
Blonde Hair
Optional Effect: Madotsuki sits down when "1" is pressed (which is what happens when no effect is equipped)
Involuntary Effect: Madotsuki's hair becomes blonde
Where Found:
Other Uses: None known
Triangle Kerchief
Optional Effect: Madotsuki becomes transparent when "1" is pressed.
Involuntary Effect: Madotsuki wears a triange kerchief as a tiara, symbolising death.
Where Found:
Other Uses: Useful for getting past Toriningen in several areas. Toriningen are no longer aware of her, but will transport her if intentionally interacted with. (You can also bump Uboa.)
Witch
Optional Effect: Madotsuki can fly in the air.
Involuntary Effect: Madotsuki's dresses as a witch, and gets on a non-functional broom.
Where Found:
Other Uses: In the mall, Madotsuki is able to fly from the top of the store.
Demon
Optional Effect: Madotsuki casts a lightning strike when "1" is pressed.
Involuntary Effect: Madotsuki turns into a demon
Where Found:
Other Uses: None known
Buyo Buyo
Optional Effect: Madotsuki "jiggles" when "1" is pressed
Involuntary Effect: Madotsuki turns fat.
Where Found:
Other Uses: None known
Stoplight
Optional Effect: Madotsuki's light changes from red to green or green to red when "1" is pressed. Other characters are stopped by this effect when her red light is on.
Involuntary Effect: Madotsuki turns into a stoplight.
Where Found: Forest
Other Uses: Monoko when stopped changes appearance and a full-screen event can be seen by interacting with her. The Nexus
Instructions
Optional Effect: Instructions appear on screen when the effect is selected
Involuntary Effect: None
Where Found:Madotsuki starts with this effect
Other Uses: To understand the game, these can be read
Pseudo-effects
Chair
The chair in Madotsuki's dream room can be ridden when Madotsuki sit on it then pulls the chair away
Optional Effect: Madotsuki gets off the chair when "Z" is pressed
Involuntary Effect: Madotsuki hops to places now while sitting on her chair
Where Found:Madotsuki's dream room
Other Uses: Speed Glitch (see below)
Speed Glitch
Sitting in the chair (above), then equipping an Effect will cause the player to double their speed upon getting up. Although Madotsuki will appear as her normal sprite (until going to an 8-bit map), her effect will be active. The bicycle is the most commonly used effect for this, which more than quadruples her speed. The Speed Glitch is an oversight caused by allowing the player to use the menu in the chair.
Optional Effect: Madotsuki will sit if 1 is pressed, but the other effect will try to happen as well. (e.g. with the bike, the bell will also ring.) If you switch effects in the menu, speed boost wears off.
Involuntary Effect: Madotsuki's speed increases dramatically + any other involuntary effects associated with used Effect aside from appearance-related effects (after getting off the chair).
Where Found: Madotsuki's dream room
Other Uses: None