The mats were spread out from one end of the No1 basketball court to the other, with fighters rotating on and off for sparring sessions.
Some, like Wanganui's Kasey Watson, would take on Commonwealth Games competitor Sam Rosser, despite a considerable weight disadvantage.
Athletes who had attended the Commonwealth and Olympic Games also sat the cadets (age 15-17) down for talks on training and preparing for the big events.
"It was an eye-opener for those young ones to see what was involved," said Watson.
The Wanganui club's Kasey Watson and Aiden Voice, along with Wanganui City College Judo Club's Antoine Rahier and Finn Brown, have qualified for Oceania through their performances at last year's national competition.