[2] On August 1, 2010, Villanueva won the vacant Philippines Games and Amusement Board (GAB) flyweight title via TKO in the 7th round against Brix Ray.

[3] On December 19, 2012, "King" Arthur Villanueva won the vacant Oriental and Pacific Boxing Federation (OPBF) super flyweight title via unanimous decision against the Japanese Taiki Eto in a fight held at Korakuen Hall, Bunkyo, Tokyo.

[4] On July 13, 2013, Villanueva captured the vacant WBO Asia Pacific super flyweight title by defeating a Mexican fighter Arturo "Fuerte" Badillo via TKO on the 4th round.

[5] On October 26, 2013, at the Pinoy Pride XXII, Villanueva won the vacant WBO International super flyweight title after his devastation of Mexico's Edgar Martinez of whom he dropped twice on the very first round.

[citation needed] During the Pinoy Pride XXVII held at Dubai World Trade Centre, Dubai, United Arab Emirates, Arthur Villanueva gained the IBF International Jr Bantamweight title by stopping Henry 'El Crespo' Maldonado of Nicaragua via split decision, scoring 117-110 and 116-113 from two judges.