Forgotten Betty Boop Character Aloysius/Billy Boop

Aloysius appeared in the early Betty Boop Cartoons and a few early Talkartoons. He was also known as Billy Boop from 1932, he first appeared in Minding the Baby (1931) as the baby brother of Bimbo the dog, Aloysius/Billy was suppost to have made a re-apperance in Betty Boops Double Shift in 2008, but he was left out, although he appears on the official artwork sitting next to Pudgy the Dog.
His Voice was provided by
Mae Questel in Let me Call you Sweetheart & Stopping the Show
Margie Hines in Boop-Oop-a-Doop
Billy Murray in Minding the Baby
Kate Wright in Betty Boop's Birthday