>>44433821Last time it was because it had the perfect combination of Intimidate, Fake Out, Knock Off, Snarl, and other such moves that work better in Doubles. It is immune to Prankster priority status moves from an opponent as a Dark-type, and Burn as a Fire-type. The Dark-type actually made it better because it doesn't have that Fairy weakness that it would have had if it were Fire/Fighting instead.
Now you have Rillaboom and other Grass-types taking advantage of Grassy Terrain, and naturally Incineroar remains one of the bulkiest Fire-types in the metagame that also has Intimidate. Incineroar is sent in to stop Rillaboom, and possibly soon enough Tapu Bulu as well once that thing comes back with Grassy Glide. Also, when Tapu Lele eventually comes back to dominate the metagame again, Incineroar will be there.
