Sergio
Sergio (Japanese: スギオ Sugio) is Noland's assistant. He appeared in Numero Uno Articuno and The Symbol Life. His English voice actor is David Chen and his Japanese voice actor is 梯篤司 Atsushi Kakehashi.
He is Noland's first apprentice, although he jokes around with the Frontier Brain when one of his inventions failed. He also officiated the match between Noland and Ash and with winner Ash.