I don't know how current this information is:
https://www.familysearch.org/wiki/en/New_Zealand_Church_RecordsThere are currently no Catholic church records for New Zealand available online. Most Catholic registers are kept in the parish where they were created. To find which parish your ancestor may have attended, visit the Catholic Diocesan website. There are six Catholic Dioceses in New Zealand:
• Auckland - Catholic Diocese of Auckland at 30 New St, St Mary’s Bay, Auckland 1011, New Zealand
• Christchurch - Catholic Diocese of Christchurch at 2/9 Washington Way, Sydenham, Christchurch 8011, New Zealand
• Dunedin - Roman Catholic Diocese of Dunedin at 300 Rattray St., Private Bag 1941, Dunedin 9054, New Zealand
• Hamilton - Catholic Diocese of Hamilton at 51 Grey Street, Hamilton East 3216, New Zealand
• Palmerston North - Diocese of Palmerston North at 33 Amesbury Street, Private Bag 11 012, Palmerston North, New Zealand
• Wellington - Catholic Archdiocese of Wellington at 22-30 Hill Street, Thorndon, WELLINGTON 6011, New Zealand
Additionally, the Catholic Dioceses of Auckland and Christchurch have diocesan archives that house some parish registers.
• Auckland - Catholic Diocese of Auckland Pompallier Heritage Centre and Archives at 30 New St, St Mary’s Bay, Auckland 1011, New Zealand - genealogical research is only permitted for records taken before 1900
• Christchurch - Catholic Diocese of Christchurch Archives at 2/9 Washington Way, Sydenham, Christchurch City 8011
The Auckland War Museum also has many church records, including Catholic records, that are available to look at in their reading room. They also have some church records available online.
You could Google the Diocese as listed and try to obtain information........
Minniehaha.