Tonight marks the start of Mighty Ronaldo's quest to add the $450,000 feature to an already impressive list of big race victories.

The reigning Retravision-Fremantle Cup winner makes his keenly anticipated return in tonight's The Trots WA Pace (2536m) and takes on a previous Fremantle Cup runner-up Patronus Star.

Mighty Ronaldo comfortably won a 2100m trial in 1:59.0 at Bunbury earlier this month in preparation for his return.

Trainer Justin Prentice said there were plenty of positives to come out of the trial performance, where he was driven by Gary Hall Jnr.

"I was happy with his trial," Prentice told TABradio.

"We wanted to give him a reasonably decent hit out, so we made sure his last 1200 was pretty solid.

"Junior was happy with how he felt, so that was the main thing."

Following his Fremantle Cup win, Mighty Ronaldo went on to run third in January's WA Pacing Cup, before a luckless run in the inaugural Nullarbor ended his campaign.

Prentice said he hoped Mighty Ronaldo's last campaign would hold him in good stead going forward.

"Last time in was his first real crack at Free-For-All company," he said.

"Hopefully, this prep you see a better horse that's a bit stronger and used to racing in that company.

"He went three weeks in a row to the Fremantle Cup.

"If we want to put more racing into him then we've got that up our sleeve."

Patronus Star will start from barrier one in tonight's event, with Mighty Ronaldo set to be his main danger from barrier two.

Meanwhile, Prentice's quest for a third straight WA Derby (2536m) appears on track, with Rolling Fire and Never Ending set to give him a strong hand in November's Group 1 event.

Rolling Fire continued his unbeaten start to his Derby campaign with a comfortable win at Gloucester Park last Friday.

Prentice said he was slightly concerned at the end of Rolling Fire's last campaign but was confident he had him back on track ahead of the Derby.

"He had that little bit of a questionable run where he led and got beaten in the Pearl heat," he said.

"He had a freshen-up after that and his work and his races since that have been where we expected him to be."

Prentice said the unbeaten Never Ending wasn't far away from a trial to start his Derby preparation.