it was released on December 14, 1985 and Bubble Bobble was released in 1986. Fukio Mitsuji might see that episode and model Bub and Bob after it.
Gummi Bears was broadcasted in Russia in 1991-1992. i discovered Bubble Bobble on ZX Spectrum in 1992-1993, and my first thought was that the game is based on that cartoon!! i even wrote it down in my Bubble Bobble instruction set for ZX Spectrum (in 1993):
if anyone is interested in watching that particular episode, PM me, i will provide the link to DVD-Remux.