Comeback Labour MP Kelvin Davis expects "presents like the blankets and beads of yesteryear" to be produced to woo voters to the Internet-Mana Party alliance.
"Kim Dotcom [who funds the Internet Party] will say all the right things, but he's not about to help Maori - he's motivated by his extradition proceedings," Mr Davis said.
Mana Party leader Hone Harawira and Internet Party chief executive Vikram Kumar announced the alliance and the signing of a memorandum of understanding between the two parties last week.
The parties will retain their own identities, but a new political party - Internet Mana - will be formed to fight the election in September.
Mr Davis claimed Internet-Mana promises made to people in the Te Tai Tokerau electorate would not eventuate.