Earlier concepts showed that she was going to be the referee, but was replaced by a new spider character. Momo makes a small cameo in the Halloween 2018 as a painting on the mansion level.

she is shown dressed in a Yellow Witch costume in a reference to her owner being a Yellow Witch in the Halloween 2015 Doodle. Momo plays a major role in the video for Halloween 2017 as the first Trick-or-Treater who encounters Jinx the Ghost. Momo appears on a party hat in Google's 19th Birthday. Momo appears in the Earth Day 2017 doodle where she is shown helping the environment along with a Fox and Froggy.

In the game, Momo defeats the ghosts by the player drawing symbols with her wand that appear above the ghosts' head. She is a freshman student at a wizarding school with several other animals including a Frog, a Dog, an Owl, and an anthropomorphic Pumpkin. Momo later stared in her own game in the Halloween 2016 doodle.

Appearing as a normal non-anthropomorphic cat owned by the Yellow Witch (to show that she is obsessed with cats). Momo made her debut in the Halloween 2015 doodle. Momo is a Black Cat character that has appeared in several Doodles, Momo is based on a real cat (born April 15 2010) who was owned by former Doodler Juliana Chen and now lives with her relative Sidney.

Halloween doodle game