Even those who have traditionally supported him, including the Zimbabwe War Veterans Association, were adding their voices to say Mr Mugabe's time was up.
Ms Scrooby said transport could be arranged for Northlanders interested in going down to Auckland but who faced difficulty getting to and from the protest venue.
"It's the first time we've had such grassroots support for a change rather than calls for a change at a political level and that's what intrigued me," she said.
"People are just owning it in their own little way. At the cricket match in Bulawayo (Black Caps v Zimbabwe) the other day, police arrested 14 people for carrying Zimbabwe flags and singing the national anthem."
Ms Scrooby said Northlanders could add pressure on the New Zealand Government to hold Mr Mugabe accountable.
Those interested in joining the protest in Auckland can contact Ms Scrooby on 021 308 050.
Pastor Mawarire has lately become a target of Mr Mugabe who accused him of being an agent of western countries to stir dissonance in Zimbabwe.
He sought refuge in South Africa after treason charges against him were dismissed.