The National-led coalition will be confronted by a united front of Māori at Waitangi on Monday.
The Crown is due to be welcomed onto the grounds on Monday at 11.
Opposition parties, and other iwi, were welcomed at the weekend.
Te Pāti Māori was welcomed separately to Labour and the Greens, saying it is joining forces with other mana motuhake-led groups, such as the Kiingitanga to stand in unity against the Coalition Government which they're calling a three-headed Taniwha.
Minister for Māori Development Tama Potaka spoke to Corin Dann.