Kamo Intermediate School principal Paul Shepherd travelled with the team and said the victory was a true team effort.
"I think it's a fantastic effort that encompasses the culture of KIS, the way they played together."
Travelling away was a challenge, but was made easier by the side's enthusiasm, and a small team of supporters who travelled to Auckland for the game, and who outnumbered the Bombay supporters. The team also demonstrated commitment by being the first to the match venue.
Coach Sam Walker said the nature of Twenty20 meant that, on any given day, any one of two teams of similar ability could win.
The KIS team had the right batting/bowling/fielding mix to potentially win the national final, he believed.
Eleven of the school team play or have played representative cricket together, and have played club cricket with or against each other for the past four years, giving the school side a unique bond.
"If I was going into a final and wanted a team to fight for me, it would be this side," Mr Walker said.