In their second-round match-ups late on day two, it was the experience of Mount Maunganui duo Butler and Jonas Tawharu that saw them advance through to the third round while their fellow team members were eliminated to the repechage rounds.
Both Butler and Tawharu won their heats with scores of 14.60 and 12.83 respectively.
"I had a local Japanese surfer in my heat who knew the banks really well, but I got a good right-hander that grew, and it was nice and steep, so I surfed it my best on my backhand to take the early lead then backed it up with another right," said Tawharu.
"I'm feeling really confident in the small waves especially, on my backhand, and the whole team is ripping with a lot of kids still in the main round. Kehu and I have a break tomorrow and then back on for qualifying round 3 the following day."
Teammates Elliott Brown (Dun) in the Under 18s as well as Dylan Preston (Mount), Caleb Cutmore (Ham) and Horne in the Under 16s were relegated to the repechage rounds after placing third in their heats to some strong competition from the major nations.
Earlier in the day, the girls' divisions got the action underway.
Raiha Ensor (Mount) came from behind in the second half of her heat to post a 12.73 point heat total and advance while Saffi Vette (Gis) advanced in first place with an 11.96 point heat total.
Both Elin Tawharu (Mount) and Tegen Bishop (Chch) placed second in their respective heats to advance.
Those relegated to the repechage rounds today will join Jared Gebert (Ohope) who was pipped in the final two minutes and finished third in his heat on day one. William Van Der Beek (Mount) had the day off.
The swell is forecast to build on day three, and for the following two days, however, the onshore wind is also predicted to accompany the building swell.