>>44878539>What do angry gardevoirs do?Be angry? Telepathically shout at you, attack you if its appropriate? Tell you off? If you're a pokemon they could just curse you out.
>What sounds do they make?"GARDEVOIR!" or parts of that word. Alternatively their video game cry.
>Do they use their psychic powers to just trash their immediate surroundings?If they were throwing a temper tantrum sure, but that would fade as they get older. No clue what an "Adult" Gardevoir age is, but assuming its like an adult, by around 18-20 years old they should probably be old enough and in tune with their emotions to learn how to calm down and not destroy things because they are mad... unless the Gardevoir in question is immature and breaks things when angry.