Progressive Party leader Jim Anderton says he'll be a guerrilla fighter as an MP on the opposition benches.
Mr Anderton retained his seat in Parliament, winning the Wigram electorate with a majority of more than 4,500 votes.
He says, in some ways, he's looking forward to his new role of holding a National-led government to account.
The Progressive Party missed out on gaining a second MP, which would have been former MP Matt Robson, after gaining only 0.93% in the party vote.
