Victini~ Sounds hyperactive
Janobii and Jaroda~ sounds like someone's saying "ewww... a snake", and "EEEEEEEEEEEHH! A BIG SNAKE!", respectively
Koromori~ sounds just like a cave bat, as well as being incredibly cute
Chiramii~ whoo!
Tamagetake and Morobareru~ sounds like they're going "heeey!" and "heeyey!" (come to me so I can status you! Don't I look inviting with my pokeball shape?)
Gochiruzeru~ ....scary. o.o
Ice cream cones~ sounds like the clinking of ice cubes in a glass
Rigray and Oobemu~ sounds just like alien interference
Shandera~ it sounds like the screaming of forsaken souls as they burn in a fire... which is exactly what it does!
Maggyo~ oh, boy.... not only does it look weird, but it sounds weird too. I'm wondering if it was a game developer's joke to make it something like a whoopie cushion