ビーストブースト (Beast Boost)
第VII世代ほかのPokémonを倒すと、このPokémonの最も高い能力が1段階上がる。
対戦中のビーストブースト
Beast Boost raises the Pokemon's highest stat by one stage each time it knocks out an opposing Pokemon. The stat that gets boosted is determined at the start of battle based on the Pokemon's actual stats after EVs, IVs, and nature are applied — not base stats. If two stats are tied, the game uses a fixed priority order: Attack, Defense, Special Attack, Special Defense, Speed.
This snowball effect makes Ultra Beasts progressively more dangerous with each knockout. For example, Pheromosa will typically boost its Speed or Attack, while Xurkitree will boost its massive Special Attack, potentially reaching overwhelming levels after just one or two knockouts.
Beast Boost is the shared signature ability of all Ultra Beasts introduced in Generation VII, including Nihilego, Buzzwole, Pheromosa, Xurkitree, Celesteela, Kartana, Guzzlord, Poipole, Naganadel, Stakataka, and Blacephalon. The ability reinforces the offensive playstyle these Pokemon are designed around.
ビーストブーストのポケモン（11）
| # ▲ | 名前 | タイプ | ほかの特性 | 隠れ特性？ | HP | Atk | Def | SpA | SpD | Spe | 合計 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| #793 |  | ウツロイド | – | 通常 | 109 | 53 | 47 | 127 | 131 | 103 | 570 | |
| #794 |  | マッシブーン | – | 通常 | 107 | 139 | 139 | 53 | 53 | 79 | 570 | |
| #795 |  | フェローチェ | – | 通常 | 71 | 137 | 37 | 137 | 37 | 151 | 570 | |
| #796 |  | デンジュモク | – | 通常 | 83 | 89 | 71 | 173 | 71 | 83 | 570 | |
| #797 |  | テッカグヤ | – | 通常 | 97 | 101 | 103 | 107 | 101 | 61 | 570 | |
| #798 |  | カミツルギ | – | 通常 | 59 | 181 | 131 | 59 | 31 | 109 | 570 | |
| #799 |  | アクジキング | – | 通常 | 223 | 101 | 53 | 97 | 53 | 43 | 570 | |
| #803 |  | ベベノム | – | 通常 | 67 | 73 | 67 | 73 | 67 | 73 | 420 | |
| #804 |  | アーゴヨン | – | 通常 | 73 | 73 | 73 | 127 | 73 | 121 | 540 | |
| #805 |  | ツンデツンデ | – | 通常 | 61 | 131 | 211 | 53 | 101 | 13 | 570 | |
| #806 |  | ズガドーン | – | 通常 | 53 | 127 | 53 | 151 | 79 | 107 | 570 |