Ultra Violet/guide

Rabbit
Go to the Crayon World, go left and down from the entrance and enter the shop, collect the coins on the floor around the shop then use 300 coins to buy the Rabbit effect from the rabbit seller.

or

Go to the Crayon World. Go left a bit and down from the door. Interact with the needle in the ground to reach Needle Maze. Interact with: The needle behind you, top left, above you, top right and top right. Interact with the needle with red string going through it. Find the rabbit siblings at the table and interact with them to get the effect.

Headless
Go to the Meat World, go up from the top-right corner of the door and find a headless dead body that has blood on the neck, interacting with the neck will give you the Headless effect.

Magician
Go to the Forest World and find a small green building to the Church, go right to the Dark Forest and go to the exit will lead you to a door to the Library, find a door to a room that has a blonde girl and magic circle, interact with her will give you the Magician effect.

Lampost
Go to the Ancient World and go up to the stair that you first reach, go through the doors until you reach an entrance to the Lampost World, than find a short lampost that gives you the Lampost effect.

Nail Hammer
Go to the Old Building World and go right to a dark room with lots of obstacles, go up to the exit to a light blue hallway (better with Lampost effect), you can find a metal locker, go into a room with buttons and interact with the computer, follow the hint and push the buttons will make the locker open, interact with the flesh in the locker gives you the Nail Hammer effect.

Cake
Go to the Crayon World and find a nail to the Nail Teleport Maze, each time you reach 2 portal you choose [right, down, up], then interact with the nail to the Cave and go out, go right to the Cookie World and find the cake castle, interact with the cake NPC on the top of the castle gives you the Cake effect.

Coat and Muffler
Go to the Ancient World and go to the stair on the right, find an entrance that lead you to the Building, go up and enter a room with a stand before going up to the rooftop, interact with it leads you to the Block World, find the coat and muffler that give you the Coat and Muffler effect.

Egg
Go to the Crayon World and find a nail to the Nail Teleport Maze, each time you reach 2 portal you choose [left, right, right], then interact with the nail to the Glass Elevator World, enter the first elevator then go left and enter 2 more elevator to a place that has an egg which leads you to the Egg World, find an white egg that gives you the Egg effect.

Android
Go to the Neon World, go [up, left, left, down, down, right] and enter the entrance to the Spaceship, go to the top and interact with a female robbot that gives you the Android effect.

Short Hair
Go to the Old Building World and go up to a door that is blocked by the boxes, use Nail Hammer effect to destroy the boxes and enter the door, interact with the closet that has blood on the top-right corner to the Red Water World, avoid the chasers and enter a building that has a big scissors, interact with it gives you the Short Hair effect.

Miko
Go to the Snow World and interact with the green tree on the left to the Summer World, go between 2 stone in the farm then go up to the Shinto Shrine, find a room that has a Saisen Box and a Miko, pay 1000 yen to the Saisen Box will give you the Miko effect. (Hint: The room and the Shinto Shrine are in different map, it is helpful if you don't have enough money.)

Shikkenken
Go to the Snow World, go down and right from the door and find a child/winter youkai that is jumping around in a circle, interacting with them will give you the Shikkenken effect.

Ribbons/Pigtails
Go to the Neon World, go [up, left, left, up] and enter the entrance to the FC world, go to the town and enter the house on the top to the FC Dungeon, each time you reach the places that have 2 doors above you choose [left, right, the 3rd door from left] to a room that has a FC girl NPC that gives you the Ribbons effect.

Sea Hare
Go to Ocean World and find a pink Sea Hare, interact with it gives you the Sea Hare effect.

Menus Guide
There will have 4 types of basic menus that are selectable at the start (violet, monochrome, silver and violet II), you can also collect the other menus below by interact with NPCs or acchieve the events.

orange
Go to the Snow World and find a girl with blond hair in twintails and an orange and silver striped scarf.

cookie
Go to the Crayon World and find a nail to the Nail Teleport Maze, each time you reach 2 portal you choose [right, down, up], then interact with the nail to the Cave and enter [right, right] cave to the balcony, go to the end and interact with the cookie NPC.

hexe
Go to the Library and lighting up 5 candles, then go to the place where you get the Magician effect and stand in the center of the magical circle.

violett
Go to the Ancient World and go to the stair on the right, find an entrance that lead you to the Building, go up until you reach the rooftop, equip the Magician effect and start the witch flight event.

old black
When you entered the FC World you will automatically get it.

old blue
Go to the Neon World, go [up, left, left, up] and enter the entrance to the FC world, go to the town and enter the School, go to the last room of second floor and interact with the treasure chest.

green
Go to the Ocean World and find a green plant that leads you to the Green Plant World, go through the map until you reach a small house, interact with the girl in the house.

Distorted Neon World
(Activate with Nail Hammer. For full preference of this event, the Egg effect is required.)

In Spaceship, there's a room with a School Uniform Girl. Smash by Nail Hammer to turn her into a chaser, she will send you into an isolated room of Neon World, where has a yellow switch on floor. Step on the switch a couple of times will make the BGM slow down and NPCs in Neon World change into a glitch form that could not be hit by Nail Hammer. Use the Egg effect to return to nexus, you will find that pattern of the door to Neon World become a mess mosaic instead of rows.

Shinto Shrine
There has a black masked man near from the entrance, when you equiping the Nail Hammer effect he will shake his head, he doesn't vanish like other NPCs when you kill him. There has another man with 2 faces, he will open his big eye a second before you kill him. The doors with duct tape only can be opened when you equiping the Miko effect which are the shortcut between the Miko's room and the exit.

Big Hole in Egg World
There has a big hole in the Egg World, stand on the foot step beside the hole and interact with it will make Sometsuki jump into the hole and drop back to Ancient World. [There has a 1/10 probability that Sometsuki will crash to the floor of Ancient World and decapitate, then she will be forced to wake-up. Use the Headless effect before jumping causes a definite decapitation. ]

House in Green Plant World
The girl who gives you the green menu usually has 4 kinds of motion each time you entering her room: normal standing, sit down and watch tv, sit at the desk or sleep on the bed. She will react to you when you equiping most of the effects, especially be excited by Rabbit or Ribbon. But if you hold the weapon she will try to avoid from you or don't want to look at you. [There has a 1/48 probability that the girl will absent from her room and the book on the desk will open, interact with the book will start an event. ]