The 33-year-old has lavished praise on the starlet and has tipped him to adapt well to his new surroundings.
All eyes have been firmly focused on the 21-year-old after he finally sealed his move to Barcelona, and Ronaldinho, who spent five years at Camp Nou, believes the youngster has what is required to become the best player in world soccer.
"It will be wonderful to see him play for Barcelona," he told Brazilian media. "They are a great club in one of the best leagues in the world.
"He will certainly adapt well because he is a player who has everything needed to be the best in the world."
Neymar is expected to be unveiled by the Blaugrana early next month before turning his attentions towards the Confederations Cup with Brazil on June 15.
Ronaldinho was left out of coach Luiz Felipe Scolari's squad for the tournament.