Ovono started to play football in a club (Maria Auxiliadora) from the 3rd division and eventually the team got promoted to the second division, and after great performances in the 2nd division, he signed with Sony Elá Nguema of the first division. Ovono won several league titles with this team and consequently started to be part of the national team. In 2012, he was part of the team that played the African cup that was co-hosted by Equatorial Guinea and Gabon. He didn't play any minute in this competition and the team reached the quarter-finals where they were eliminated by the finalist Ivory Coast.