Cooper has represented the Blues U18s.
The tournament will take place at Sacred Heart College in Auckland.
Full squad: Arikitohia Hood-Kaitapu (Westlake Boys), Caleb Leef (Rangitoto College), Coel Kerr (Paeroa College), Connor Moors (Liston College), Dennis Koro (Kerikeri High School), Donovan Mataira (Hastings Boys), James Te Paire (King High), Johnny Cooper (Westlake Boys), Jordan Thompson (Hastings Boys), Judda Turahui (Kings College), Justice Hall (St. John's College, Hamilton), Keelan Whitman (St. Pats Town), Kingi Herewini (Rodney College), Liam Udy-Johns (Hastings Boys), Lukas Halls (Kings College), Matiu Samuel (Rongotai College), Revin TeTawhero Storey (One Tree Hill College), Robert Rush (St. Kentigern College), Tahu Kaa (Christchurch Boys High), Valynce Crosby-Te Whare (St. Paul's Collegiate, Hamilton)