He was created by Jumba Jookiba and Dr. Jacques von Hämsterviel. In Stitch! The Movie, his pod was sent flying into Hawaii and scattered. The Unburned Ice Cream Tourist stood on his pod which caused it to fly into the sea and rehydrate him. He then turned the man into a baby.
Lilo and Stitch found him turning construction workers into babies and after Nani yelled at Lilo and Lilo wished she was older than Nani, Stitch freed Babyfier to make Lilo's wish come true. The plan worked, but Babyfier turned Stitch, Pleakley and Jumba into babies as well, forcing Lilo to look after them. Captain Gantu then found him and took him, only for Babyfier to turn him into a baby as well!