Pheromosa does not evolve and does not have a pre-evolved form.
Pheromosa is in the Undiscovered Egg Group. It takes Pheromosa 1,250,000 Experience Points to reach Level 100.
Pheromosa is yet to appear in a spin-off game.
Trading Card Game
Pheromosa is yet to appear in the Trading Card Game.
Pheromosa is yet to appear in the anime.
Pheromosa is yet to appear in the movies.
Pheromosa is yet to appear in the manga.
Pheromosa is the first Ultra Beast to be banned to the Uber tier. The first thing that should stand out to competitive players is perhaps Pheromosa's outstanding base 151 Speed, the third fastest Speed stat in existence. This narrowly edges out powerful threats in Deoxys-A and Mega Alakazam. Both of its offenses, each standing at 137, can be put into use, allowing Pheromosa to run special, physical, or mixed sets making it rather unpredictable, and also makes Pheromosa one of the best users of a Life Orb. It has acceptable coverage options, sporting moves such as Poison Jab and Ice Beam, as well as a boosting move in Quiver Dance allowing it to function as a dangerous sweeper should you find the opportunity to set up. Pheromosa can also function as a hazard remover, because of its access to Rapid Spin, and coupled with its high Speed stat allows it to control entry hazards as a last resort. It is recommended to run a positive Attack nature such as Naughty so the Beast Boost goes to Attack. A positive Speed nature can be run for the sake of outspeeding Deoxys-A and Mega Mewtwo Y, but in doing so, Pheromosa has to give up the potential to sweep.
However Pheromosa is a frail as can be with horrible 71/37/37 bulk. This makes it difficult to switch in and very punishable if Pheromosa fails to KO its target. It is also usually outclassed by Deoxys-A as a frail, hard-hitting attacker; Deoxys-A has access to priority and has better coverage. Additionaly, Bug/Fighting is a terrible typing in Ubers, as it often loses to powerhouse Fairies and Ghosts in the tier such as Giratina and Xerneas. Nevertheless, Pheromosa is a threat that should not be taken lightly, as it can grab the opportunity to sweep most of your team if not all of it if you're unprepared.
Via Move Tutor