The Neko Yummy appeared in 2010 TV series called Kamen Rider OOO. The Neko Yummy (ネコヤミー Neko Yamī) is a cat Yummy created by Kazari by using a Cell Medal on the gluttonous Monta Fukuji (腹時 門太 Fukuji Monta, portrayed by Jyubun Fukuzawa). With a parasitic White Yummy having him submit to his gluttony, Monta consumes food voraciously. When Eiji fights Monta, he holds back because he is still human. However, the White Yummy emerges from Monta and transforms into the Neko Yummy, whose fat made him immune to cutting attacks. However, Kamen Rider OOO changes tactics and uses blunt attacks to weaken the Neko Yummy before attempting to use the Tatoba Kick to finish him, only to be saved by Kazari. Going back into Monta's body, the Yummy force feeds him to become complete while consuming the human from the inside out. However, assuming Takatorartar, Kamen Rider OOO manages to use his new found high speed kicks to keep the Yummy's wound open long enough to pull Monta out, allowing Kamen Rider OOO to use a Triple Scanning Charge OOO Bash attack to destroy the Yummy.
A Neko Yummy was part of the revived monster army of Kamen Rider Bujin Gaim in the world of the Sengoku Period. It was part of a group of four Yummy along with the Waste Yummy, Kuro Ageha Yummy, and Fukuro Yummy, which attacked the OOO Army at their lord Nobunaga's HON-NOHJI castle, fighting Bujin OOO as well as Armored Riders Gaim and Ryugen. All four Yummy survived the attack and were last seen standing by Bujin Gaim's side as the Armored Riders fled after the Pitcher Plant Monster consumed Bujin OOO.