There, Ronny auditioned for various clubs such as Baraúnas and ABC (RN), and was accepted for the ABC squad, where he played in their youth system until he was 19. At 20 he was promoted to the first team and began training with the professionals after impressing in the Premier League U-20 and BH Cup tournaments, being top scorer in both competitions. After a good showing in the Brazilian Championship Series B in 2003, especially in the match between ABC (RN) and Clube de Regatas Brasil, he was transferred to Criciúma Esporte Clube.
Ronny auditioned for various clubs like Baraúnas and ABC (RN), joining their youth system at ABC until he turned 19. At 20, he was promoted to the first team after impressing in Premier League U-20 and BH Cup tournaments, becoming top scorer in both competitions. Following a strong performance in the Brazilian Championship Series B in 2003, particularly against Clube de Regatas Brasil, he moved to Criciúma Esporte Clube.