Popplio uses the Torrent Ability, which increases the power of its Water-Type moves by 50% when its HP falls below a third of its maximum. Its Hidden Ability is Liquid Voice, which turns all sound-based moves to Water type.
Popplio appears as the Water-type Starter Pokémon in Pokémon Sun and Moon. If the player chooses Popplio as their starter, their rival Hau will choose Litten. Alternatively, if the player chooses Rowlet, Hau will choose Popplio.
Popplio is yet to appear in a spin-off game.
Trading Card Game
Popplio is yet to appear in the Trading Card Game.
Popplio is yet to appear in the anime.
Popplio is yet to appear in the movies.
Popplio is yet to appear in the manga.
Via Move Tutor
Related ThreadsRowlet, Litten or Popplio? Final Starter Choice Thread - last post by @ Nov 27, 2016
Popplio learns Disarming Voice?? - last post by @ Jun 21, 2016
Litten or Popplio? - last post by @ Nov 1, 2016
Rowlet, Litten and Popplio plushies are here! - last post by Squiggle @ Jul 29, 2016