Key System

The Key System menu

The Key System (Japanese: キーシステム Key System) is a feature of the Unova Link in Pokémon Black 2 and White 2. It allows players to change the difficulty level of the game, switch between Black City and White Forest, and change the Mystery Door in the Underground Ruins. They can be shared between players using the Unova Link, but players can only share the keys that are exclusive to their version.

Difficulty

For the first time in a Pokémon game, there are different difficulty levels. There are three different modes: Easy Mode (Japanese: アシストモード Assist Mode), Normal Mode (Japanese: ノーマルモード Normal Mode), and Challenge Mode (Japanese: チャレンジモード Challenge Mode). Only Normal Mode is unlocked by default; Easy Mode and Challenge Mode must be unlocked through the course of the games. Because they are unlocked only after defeating the Champion, the player must start a new game in order to play the main storyline with a different difficulty.

In Easy Mode, opponents use less competent artificial intelligence and the level of opposing Trainers' Pokémon are lower than usual. However, their Pokémon's stats are still calculated using the levels from Normal Mode; as such, many Trainer battles become slightly easier, but they provide less experience and prize money. The player is rewarded with the Easy Key (Japanese: アシストキー Assist Key) after defeating the Champion in Pokémon White 2.

In Challenge Mode, opponents use more competent artificial intelligence and the level of opposing Trainers' Pokémon are higher than usual (1 level higher at the start of the game, and rising to 5 levels higher by the end of the game). Gym Leaders and the Elite Four each use one additional Pokémon on their team, as well as their party having different movesets and held items, and their Pokémon's IVs are all set to 30. However, Trainers' Pokémon's stats are still calculated using the levels from Normal Mode. The player is rewarded with the Challenge Key (Japanese: チャレンジキー Challenge Key) after defeating the Champion in Pokémon Black 2.

To unlock Easy Mode in Black 2 and Challenge Mode in White 2, the respective keys for each version need to be transferred from a player with the opposite version via the Unova Link.

City

The version exclusive cities, Black City and White Forest, are found by default in Black Version 2 and White Version 2, respectively. They can be unlocked in the opposite game if certain conditions are met.

After completing the five areas of Black Tower in Black 2, the player will be rewarded with the Tower Key (Japanese: まてんろうのカギ Skyscraper Key). This can be transferred to White 2, which will unlock access to Black City. Likewise, after White 2 players have completed five areas of White Treehollow, the Treehollow Key (Japanese: じゅどうのカギ Tree Hollow Key) can be transferred to Black 2. This unlocks White Forest for Black 2 players.

Players of either version can use the Unova Link to switch between cities once both are unlocked. However, the cities cannot be switched if the player had saved their game within the current city.

Mystery Door

A mysterious door in the Clay Tunnel gives access to the Underground Ruins, where the Legendary titans can be found, though only one titan will appear at a time, depending on which key is active. Regirock is the default Pokémon in both Black 2 and White 2. Upon catching Regirock (and not just defeating it, fleeing from it or obtaining it from another game), Black 2 players are rewarded with the Iron Key (Japanese: くろがねのカギ Iron Key) and White 2 players with the Iceberg Key (Japanese: ひょうざんのカギ Iceberg Key); these allow access to Registeel and Regice, respectively. Players can obtain their final key by transferring it from the opposite version through Unova Link.

In other languages

Language Title
  Danish Nøglesystemet
  French Trousseau
  German Schlüsselsystem
  Italian Sistema a chiave
  Korean 키 시스템 Key System
  Spanish Sistema Clave
  Swedish Nyckelsystemet


Easy Mode

Language Title
  French Mode assisté
  German Hilfsmodus
  Italian Modalità aiuto
  Korean 어시스트 모드 Assist Mode
  Spanish Modo Ayuda

Normal Mode

Language Title
  French Mode normal
  German Standardmodus
  Italian Modalità normale
  Korean 노말모드 Normal Mode
  Spanish Modo Normal

Challenge Mode

Language Title
  French Mode challenge
  German Hürdenmodus
  Italian Modalità ostacolo
  Korean 챌린지 모드 Challenge Mode
  Spanish Modo Reto

Easy Key

Language Title
  French Clé Assistance
  German Hilfsschlüssel
  Italian Chiave aiuto
  Korean 어시스트 키 Assist Key
  Spanish Clave Ayuda

Challenge Key

Language Title
  French Clé Challenge
  German Hürdenschlüssel
  Italian Chiave ostacolo
  Korean 챌린지 키 Challenge Key
  Spanish Clave Reto

Tower Key

Language Title
  French Clé Gratte-Ciel
  German S-Schlüssel
  Italian Chiave grattacielo
  Korean 마천루의 열쇠 Macheollu-ui Yeolsoe
  Spanish Clave Rascacielos

Treehollow Key

Language Title
  French Clé Arbre Creux
  German W-Schlüssel
  Italian Chiave antro
  Korean 수동의 열쇠 Sudong-ui Yeolsoe
  Spanish Clave Cavernogal

Iron Key

Language Title
  French Clé Fer
  German Eisenschlüssel
  Italian Chiave ferro
  Korean 쇠철의 열쇠 Soecheol-ui Yeolsoe
  Spanish Clave Hierro

Iceberg Key

Language Title
  French Clé Iceberg
  German Eisbergschlüssel
  Italian Chiave iceberg
  Korean 빙산의 열쇠 Bingsan-ui Yeolsoe
  Spanish Clave Iceberg


  This game-related article is part of Project Games, a Bulbapedia project that aims to write comprehensive articles on the Pokémon games.