Hi there! Mega cobi fan here! The show was only aired in spain, japan, and latin america. Unless sap feeds existed in 1992, There would be no english dub of this.
I believe there was an English dub of this cartoon:
for those that have forgotten, This cartoon is based on the mascot for 1992 Barcelona Olympic Games
I know this lil' fella! I have two toys from him at my Olympic Mascot Souvenir collection, but i don't think there was an english dub of his show. As it came from Spain, i think it would be easier to export it to other Spanish-speaking countries, like in Latin America (and Brazil, which speaks Portuguese, a language very similar to Spanish). Still don't know why there's a japanese dub of this cartoon.
Edit: Just realized that the title card of the show is in English, so there's a possibility that it was indeed dubbed.