Viloria is defending his WBO flyweight title against Mexican Herman "Tyson" Marquez, who is also putting his WBA title on the line.
The weekend event will take place at the Los Angeles Sports Arena, with Filipino Drian Francisco going up against Mexican Javier Gallo in the undercard.
Pacquiao is more than half way to his training and physical conditioning under the watchful eye of his long-time trainer Freddie Roach at his Wild Card Gym in Hollywood. He will face Mexican counter-puncher Juan Manuel Marquez for a fourth time on December 8 in Las Vegas.
Pacquiao and Marquez fought for the first time in 2004 at the MGM Grand, where Pacquiao knocked down Marquez three times in the first round, but the Mexican stood his ground in the later rounds to get a draw verdict.
In 2008, Pacquiao won via a split decision and in 2011, the Filipino boxing star won via a majority decision. Read more.
The Filipino boxing superstar is coming off a controversial loss to Palm Spring boxing sensation Timothy Bradley last June 9 at the MGM Grand Garden Arena in Las Vegas, Nevada.
Pacquiao will work with veteran sportswriter Chino Trinidad,
who is covering the fight for GMA 7 television. They will provide TV viewers in the Philippines with round-by-round commentaries of the fight.