From Bulbapedia, the community-driven Pokémon encyclopedia.
The Tough condition, also called Toughness (Japanese: たくましさ Hardiness), is one of the five different Contest conditions.
A Pokémon will have its Tough condition raised when fed Pokéblocks or Poffins made with sour-tasting, yellow-colored Berries. Pokémon with Natures that boost Defense—Bold, Relaxed, Impish, and Lax—get the most benefit from Berries that have a sour flavor, as a result, they are the easiest to raise for a Toughness Contest.
When competing in the Tough category, a Pokémon with an enhanced Toughness will score higher in the primary judging of a Pokémon Contest, the Visual Competition of a Pokémon Super Contest, and the Introduction Round of a Pokémon Contest Spectacular. This can also be assisted with the use of the Yellow Scarf. Most of the moves that display Toughness are Normal, Rock, Fighting, and Ground, but moves from other types may be Tough as well.
During a Toughness Contest, the audience will react as follows:
At the end of a Toughness Contest, the winning Pokémon will receive a Contest Ribbon. Additionally, in Pokémon Diamond, Pearl, and Platinum, Coordinators are awarded special Accessories the first time they win the Contest. Different Ribbons and Accessories are awarded for winning in each of the four ranks. Finally, visiting Mr. Goods after winning the Master Rank contest will earn the players a trophy.
In Generation III there are 74 moves (or 20.9% of all moves) in Tough category.
Sinnoh Super Contests
In Generation IV there are 86 moves (or 18.4% of all moves) in Tough category.
Hoenn Contest Spectaculars
In Generation VI there are 132 moves (or 21.3% of all moves) in Tough category. 22 of old moves had their category changed into Tough, 9 had their category changed from Tough into other.
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