Chris Cairns captured six wickets for just 12 runs and former rugby international Jeff Wilson bagged 3-6 as the World XI collapsed to be all out for just 81 in the 21st over after English opener Nick Knight had made 43.
New Zealand, who won the first match of the series last weekend but lost the second, lost six wickets in their reply with Australian all-rounder Ian Harvey collecting 4-17, but still romped to victory in the 16th over.
Because the match finished so quickly on a sub-standard pitch officials arranged a 10-overs-a-side game to appease the crowd.
The three match series was organised to raise funds for victims of the Asian tsunamai and to fill a scheduling hole after Sri Lanka's tour of New Zealand was postoned.
Organisers said they expected to raise about NZ$1 million (US$700,000) for the fund.
