If Pokémon Talked (Generation I)
PiperJG for Gastly/Haunter/Gengar (Female)
Gastly is a Ghost/Poison type. It has a playful personality. It often likes to frighten or prank people for fun. For a first evolution, it would speak in a pretty low maniacal voice.
Haunter is the evolution of Gastly. It is also shown with a playful personality and being a prankster. But other Haunter likes to stalk its next victim. Haunter, despite being the evolution of Gastly, it would speak in a higher voice, but still maintains a sinister sounding voice.
Gengar is the final evolution. It is a very mischievous Pokémon, and also loves playing practical jokes. It can also be a dangerous Pokémon. Meaning it could put a curse on someone. Gengar would sound more distinct than Haunter, it would still sound sinister, but have a tiny bit of a higher tone of voice.
Gastly: We are the ghostly trio. What brings you here?
Haunter: I like to scare, but sometimes I like to make people laugh too.
Gengar: Ah, who disturbs me from my sleep... what? There's a contest for ghost types only? I'm in!
That was amazing, although Haunter and Gengar could kind of speak a little faster. But this was still an amazing audition. :)
Thank you for the feedback.
Congrats on getting cast for this role as well!