The man who mooned Prince Charles and Lady Diana in 1983 says he plans another royal outing for his rear this year, and hopes to bring in a big name to join him.

Paraparaumu-based Maori author and activist Te Ringa Mangu Mihaka, known as Dun Mihaka, bared his buttocks at the Paraparaumu air field during the royal visit 31 years ago.

Speaking to the Kapiti Observer , the 73-year-old said he plans to repeat the protest in April during the planned tour of William and Kate, the Duke and Duchess of Cambridge, if he is joined by internet entrepreneur Kim Dotcom.

The controversial traditional insult is known as whakapohane, and Mr Mihaka says he used it to highlight the ongoing cultural domination of Maori.

He said he had approached Mr Dotcom about reproducing his three books, as he says the two men have a lot in common as recognised figures of resistance due to their ''persecution'' by the state.

''I'm offering the invitation to Kim Dotcom ... between him and I, I'd say we'd be able to enact a pretty effective whakapohane at the royal visit next year,'' he said.

The whakapohane would highlight that little has changed since the 1983 incident, and that the same issues are still current, he said.

Requests by the Kapiti Observer to obtain comment from Dotcom were not successful.

Mr Mihaka has been involved in a number of campaigns related to Maori rights, including having te reo recognised as an official language of New Zealand.

In 2007 he launched and promoted a range of T-shirts and singlets branded with campaign slogans, including one celebrating the use of whakapohane.

In 2010 he was sentenced to 28 days' imprisonment for swearing at a judge.

Last year former anti-violence protester Hinewhare Harawira made headlines for performing a whakapohane to a group of elderly people during a dispute.

As a result, legal action was begun to remove her from the role of trustee with the Te Tii Waitangi B3 Trust.