Sing! Taiyaki-kun (うたう! たいやきくん) is a singing taiyaki by Gemmy, sold in Japan. It can either be powered by four AA batteries or a 6V DC adapter.
While the box has no mention of Gemmy, the back of the tray mentions the company. The tray can either be silver or black.
It sings "Oyoge! Taiyaki-kun", flaps its tail to the song, turns its head, and moves its mouth while singing. You can press the button or activate its motion sensor, and it will start singing.