A serial streaker has pleaded guilty to pitch invasion.

26-year-old Ephraim McIntyre admitted to streaking across Christchurch's Hagley Oval during the opening Cricket World Cup match three weeks ago.

His defence lawyer told the court the drain layer’s exhibitionist antics were idiotic, but inspired by a drunken and rapturous crowd.

She said he’s previously been charged for similar actions and is gaining legendary status - anything more than a fine would just encourage others.

Judge MacAskill described his antics as undesirable and fined him $1500.