Umberto is a character appearing in Pokémon: Adventures on the Orange Islands.
Season 2: Adventures on the Orange Islands
Umberto was a prophet, who attempted to get Nurse Joy and her team by making "accidents". When Umberto was discovered, he told Nurse Joy and her team the moon will go red and the island will be drowned in water. Nurse Joy ignored this and began excavating the fossils and when Team Rocket took the fossils, Umberto's prophecy was fulfilled. Thus, Nurse Joy's team made a raft and sailed away, as the island was drowned when Kabuto awakened. Nurse Joy apologised to Umberto for not listening. Umberto accepted the apology.