Back in 1989.
This artwork displays a variety of early design ideas for Bubbles, exploring forms ranging from a standard monkey to even a panda. Notably, one concept featuring antennae bears a striking resemblance to Gregory, a character Akira Toriyama would later create specifically for the television anime adaptation. Additionally, rough drafts for the Planet of the Kai can be seen scattered across the page.
*All release dates and details provided correspond to the original Japanese launches.