Six secondary schools aligned at Victoria Park in 2017 at the inaugural launch of the initiative to stem the flow of teenagers leaving the sporting code.
Cullinane College and Feilding High School have since pulled the pin on the tournament leaving just the four schools to do battle.
The aim remains to promote an annual T20 tournament for secondary school teams that do not have teams in the Cricket Wanganui Premier 1 men's competition.
It was also to complement term 1's league format with a knockout tournament in term 4.
Dilan Raj from Cricket Wanganui said the initiative was designed to help form a relationship between students and clubs.
"Traditionally the first age group to start leaving cricket is the Year 8 to Year 9 students, but the biggest exit is from the Year 10 to Year 11 15 and 16-year-olds," Raj said.
"We have purposely timed the tournament three weeks out from end of year study time when school teams don't play. They also don't play from December through to January which it is the busiest time for cricket.
"We have club representatives on hand umpiring the matches, giving them a chance to promote their various clubs and create a relationship with students who may otherwise leave the sport," Raj said.