The Sound Trial:  
How the Sound Trial works is you listen to the sound of 3 of the same Pokemon’s cries and figure out which one sounds slightly off/different. Once you’ve figured out all the sounds you’ll face against Totem Exploud. Totem Exploud has the ability Bass Boost, which doubles the power of sound type moves.  
Totem Exploud Move set:  
Boomburst  
Hyper Voice  
Flamethrower  
Ice Beam
 
Ally Pokémon:  
Loudred  
Sirentless
 
Vinyl Scratch’s team:  
Chatot  
Exploud  
Chimeco  
Bronzong