Bulky Arcanine 216 HP / 156 Atk / 124 Def / 12 SpD Adamant
Offensive:
156+ Atk Arcanine Flare Blitz vs. 180 HP / 0 Def Celesteela: 182-216 (93.3 - 110.7%) -- 56.3% chance to OHKO
148+ Atk guarantees Flare Blitz + Extreme Speed KO on 4 HP Tapu Koko
Defensive:
(-1) 252+ Atk Snorlax High Horsepower vs. 220 HP / 124 Def Arcanine: 74-88 (38.3 - 45.5%) -- guaranteed 4HKO after Figy Berry recovery
(-1) 252+ Atk Gigalith Rock Slide vs. 216 HP / 124 Def Arcanine: 74-90 (38.5 - 46.8%) -- 0.4% chance to 2HKO after sandstorm damage and Figy Berry recovery
(-1) 252+ Atk Thick Club Marowak-Alola Bonemerang (2 hits) vs. 216 HP / 124 Def Arcanine: 128-152 (66.6 - 79.1%) -- approx. 13.3% chance to 2HKO after Figy Berry recovery
(-1) 252 Atk Garchomp Earthquake vs. 216 HP / 124 Def Arcanine: 86-104 (44.7 - 54.1%) -- 45.7% chance to 2HKO after Figy Berry recovery
(-1) 252+ Atk Gigalith Stone Edge vs. 216 HP / 124 Def Arcanine: 134-158 (69.7 - 82.2%) -- guaranteed 2HKO after sandstorm damage and Figy Berry recovery
0- Atk Persian-Alola Foul Play vs. 216 HP / 124 Def Arcanine: 76-91 (39.5 - 47.3%) -- guaranteed 4HKO after Figy Berry recovery
252 SpA Nihilego Power Gem vs. 216 HP / 12 SpD Arcanine: 158-188 (82.2 - 97.9%) -- guaranteed 2HKO after Figy Berry recovery
252+ SpA Tapu Lele Psychic vs. 216 HP / 12 SpD Arcanine in Psychic Terrain: 150-177 (78.1 - 92.1%) -- guaranteed 2HKO after Figy Berry recovery
252+ Atk Pheromosa High Jump Kick vs. 216 HP / 124 Def Arcanine: 132-156 (68.7 - 81.2%) -- guaranteed 2HKO after Figy Berry recovery
252 Atk Kartana All-Out Pummeling (175 BP) vs. 216 HP / 124 Def Arcanine: 132-156 (68.7 - 81.2%) -- guaranteed 2HKO after Figy Berry recovery
164+ SpA Choice Specs Tapu Fini Muddy Water vs. 216 HP / 12 SpD Arcanine: 168-198 (87.5 - 103.1%) -- 25% chance to OHKO
252+ Atk Guts Hariyama Close Combat vs. 216 HP / 124 Def Arcanine: 165-195 (85.9 - 101.5%) -- 12.5% chance to OHKO