Brian Viloria has left a great impression on Roman Gonzalez's coach who knows enough to consider "The Hawaiian Punch" as a dangerous challenger for "Chocolatito."

The World Boxing Council flyweight champion's trainer, Arnulfo Obando, told Boxing Scene that the undefeated boxer won't have an easy title defense against the Filipino challenger.

"It's a difficult fight. Although a lot of people are talking about the age of Viloria, we can not forget that he's a very dangerous man who is experienced, hits hard, has excellent combinations. He will be coming to fight. I do not think Viloria will run, because he is under pressure to leave a good image to HBO," the coach explained.

The 34-year-old Viloria (36-4, 22 KOs) had four consecutive victories recently and his fight with Hernan "Tyson" Marquez made an impact to Obando. The coach saw that Viloria "really hits hard" with the left and could do a "lot of damage" with it.

In the video below, "The Hawaiian Punch" can be seen displaying his punching power. When Marquez was hitting him non-stop, the audience was almost sure that Viloria was on the losing end, but just a jab from him changed the outcome of the fight. Viloria eventually won the World Boxing Association and World Boxing Organization flyweight championship unification fight via a TKO in the 10th round, when Marquez's corner threw in the towel.

Knowing is half the battle, and the team of the 28-year-old Nicaraguan boxer is preparing for the power of Viloria, even though the unbeaten "Chocolatito" - who has never tasted defeat even while an amateur boxer - has left 37 of his 43 professional boxing opponents trembling after KO losses. Gonzalez is going to Big Bear, where fellow knockout artist Gennady "GGG" Golovkin trains, to prepare against Viloria, the coach revealed.

Viloria all out for the title

Meanwhile, Viloria also wants to be in "great shape" for his upcoming battle with "Chocolatito," who earned the WBC crown after defeating Edgar Sosa in May in California.

In an interview with The Philippine Star, he confidently assessed how he could emerge as the last man standing in the Gonzalez-Viloria bout scheduled on Oct. 17, at the Madison Square Garden in New York.

"I think his weakness is he hasn't been tested by a puncher like myself and we'll also have to see if he can withstand pressure," the 34-year-old former champion said.

Viloria lost his WBA and WBO flyweight championship titles to Mexican fighter Juan Francisco Estrada via a split decision loss in Macau in 2013. Now, he is preparing well for the bout for a chance to be reinstated as a current boxing champion.

"I'm pulling out all the stops to prepare for this. I'm bringing in strength and conditioning trainers and basically working hard in the gym like never before," The Filipino-American boxer said.