Manny Pacquiao hits a speed bag with photos of his upcoming opponent Juan Manuel Marquez on the wall during a media workout at Wild Card Boxing Club in Los Angeles. Pacquiao will defend his World Boxing Organization welterweight title against Marquez on N

MANILA, Philippines — Manny Pacquiao has been almost merciless in his sparring sessions at the Wild Card Boxing Club in Hollywood, something his Canadian adviser believes will bring about a smashing success come Nov. 12 in Las Vegas.

“He could have killed his sparring partners,” said adviser Mike Koncz from Los Angeles, two weeks before Pacquiao faces Juan Manuel Marquez for the third time in front of a capacity crowd of more than 16,000 at the MGM Grand.

Koncz said Pacquiao “will put an exclamation point” to his performance with a resounding victory.

“Manny has said that this fight will put an end to all the doubts and I do believe he will.”

Koncz said that Pacquiao has been all business ever since he started training at the Wild Card since early this month.

“He’s been early for morning roadwork and early for his afternoon workouts. Never seen him this serious although I am not saying that he’s not during his previous training camps,” said Koncz.

I just saw changes in the way he trained for this fight with Marquez.”

Marquez’s claims that he was robbed by the judges in his first two fights with Pacquiao has apparently incensed the Filipino pound-for-pound king into thinking that he won’t leave any doubt this time.

The last time Pacquiao was this serious was during the runup to the Oscar De La Hoya superfight in Dec. 2008.

Pacquiao trainer Freddie Roach said Marquez won’t go beyond six rounds.

More than Pacquiao’s World Boxing Organization welterweight crown, on the line on Nov. 12 will be the mythical title of pound-for-pound king.

Pacquiao is an 8-1 favorite to repulse the 38-year-old Marquez’s challenge.

The Marquez bout will be at a catchweight of 144 lbs.