And the fourth only lost in a split decision.
Larsson-Allen took his record to 2-0 after finishing off his opponent with a second-round TKO.
On her debut, Cleaver secured a unanimous points win with high pace and sharp kicks.
Vassalos faced home-crowd favourite and multiple New Zealand champion, Wiamato Hira, in a back-and-forth bout.
She scored a heavy knock-down in the second round and eventually earned a majority points win.
That took her to a 10-0 fight record and secured her a shot at the ISKA NZ championship title in Christchurch in August.
In the main event, Harris took on TMT gym’s Bubba Tairua-Bracken.
After aggressive exchanges, the latter won by a heavily-contested split decision. As a result, the fight has been put under a review and an immediate rematch has been ordered in Queenstown, where the fighters will compete for a pro NZ Muay Thai title later this year.
