Rule-Book is a held item introduced in Generation IX, exclusive to the Pokémon Scarlet and Violet games. When a Pokémon equipped with the Rule-Book uses a move that would naturally give the opponent an advantage, the move instead has no effect. This mechanic adds a layer of strategy, as players must anticipate their opponent's actions and plan accordingly.
The Rule-Book can be particularly advantageous in competitive play, where predicting an opponent's strategy can be pivotal. For instance, moves like Stealth Rock or Sticky Web, which set up hazards on the battlefield, would normally put the player at a disadvantage if the opponent could exploit these hazards immediately. By using the Rule-Book, players can negate potential traps, allowing a smoother setup phase for their own strategies.
Moreover, the Rule-Book's design is inspired by traditional rulebooks used in various competitive games and sports, symbolizing order and regulations. This thematic element underscores the item’s purpose of maintaining fairness and strategic depth in battles.
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Short Effect: List of battle types and their rules.
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| Generation | Game Index |
|---|---|
| Generation IV | 430 |
| Generation V | 430 |
| Generation VI | 430 |
| Generation VII | 430 |
| Generation VIII | 430 |