A Pokémon with the Liquid Voice Ability will have all its sound-based moves turn into Water-type moves.
The following shows all moves that are sound based. Note that while Popplio and its evolution line doesn't learn all of these moves, the Ability can still activate if these moves are called upon with Copycat, Mimic, Metronome or Mirror Move. Likewise, if this Ability is acquired by another Pokémon through use of the Receiver or Trace Abilities, or the moves Role Play or Skill Swap, these moves will still be affected by this Ability.
Liquid Voice has no effect outside of battle.
Pokémon With This Ability