Pins are crucial in the world of NEO: The World Ends With You as they provide the player characters with the powers they use in combat to defeat enemies. As you complete battles you'll earn PP, which is used to level up your Pins and makes them stronger in a variety of ways.

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Some Pins have the ability to evolve once they've reached the highest level, and you'll be prompted with a decision to evolve them once that happens. The game is even nice enough to tell you which Pins evolve on the third tab of their description box in the menu. Eventually, you'll run into a Pin where next to "Evolution" there is a "???" instead of a Yes or No — this means that this Pin cannot be evolved but must be mutated instead.

NOTE: This guide contains spoilers for every party member obtained throughout the game.

What Is Mutation?

Rindo holding a pin in NEO The World Ends With You

Mutation happens in the exact same way as evolution — all you have to do is level the Pin up to its maximum level and then select the option to mutate it when prompted. However, mutations do have one more requirement — that Pin must be equipped on a specific character when it hits its maximum level in order to mutate.

As to which character is needed for each mutation, that information is not available to you for most of the game. Once you reach Week 3 Day 6 however, you can complete a quest that will unlock the ability to view mutation requirements on the Social Network. Alternatively, you could just look up that Pin here — you don't need that ability unlocked in order for a mutation to occur.

Every Mutatable Pin

Neo The World Ends With You Pin Collection
The Pin collection menu in Neo The World Ends With You

The following table lists every single Pin that must be equipped on a certain character in order to evolve/mutate it, as well as what level it needs to be at.

No.

Pin Name

Brand

Character

Level

004

Once Upon a Dream

Top o' Topo

Fret

5

008

My Precious Moments

Top o' Topo

Rindo

15

011

Riled-Up Ribbon

Top o' Topo

Neku

3

016

Topo the Adventurous

Top o' Topo

Beat

5

021

The Benevolent King

Top o' Topo

Shoka

10

032

Disco Divekick

Joli bécot

Beat

3

055

Slashcicle

Tigre PUNKS

Beat

6

068

Classical Cacophony

Cony x Cony

Neku

5

073

Polar Princess

Cony x Cony

Fret

5

097

Kocho Void

RyuGu

Shoka

3

114

Be of Two Mines

garagara

Shoka

3

128

Let the Rain Fall Down

IL CAVALLO DEL RE

Minamimoto

5

145

The Great Balloon Voyage

Shepherd House

Nagi

3

153

A Moonlit Night Inside

Shepherd House

Nagi

3

156

A Cozy Hilltop Windmill

Shepherd House

Nagi

5

161

The Wooly Jazz Player

Shepherd House

Rindo

5

166

Shishio

Jupiter of the Monkey

Rindo

7

179

Jupiter of the Monkey II

Jupiter of the Monkey

Neku

6

192

No Turning Back

MONOCROW

Minamimoto

3

215

Lovebird Magnum

NATURAL PUPPY

Fret

5

239

HOG FANG

HOG FANG

Beat

10

267

Doku Doku Panic

croaky panic

Shoka

5

271

Snap Crackle Popcorn

croaky panic

Nagi

3

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