Also named is 2015 age grade player of the year nominee Alex Fidow of Wellington, who last year won the NZ Schools' Bronze Boot award, and Heartland player of the year nominee Stephen Perofeta who, while still at Wanganui Collegiate as a Year 13 student last year, was a key weapon in Wanganui's road to Meads Cup victory in the Heartland Championship. Perofeta was selected for the New Zealand Heartland XV squad and went on to run up 58 points in just three matches.
Robertson expects competition to be fierce at the World Championship, with England likely, despite a disappointing Six Nations, to again be strong with their Premiership players available, and Australia also providing stiff competition with the availability of Super Rugby players who have shown their wares in last week's Oceania series.
"We're in a tough pool. We've got Wales, who won the Six Nations, and Ireland, who performed really well. We've also got Georgia - they're new to the competition, after they won the tier two competition to come up and we know they love to scrum and maul and they are big men as well.
"We're excited by the challenge of going back on the world stage, and we've got an attitude that we've got to go and win the title, not just defend it. We're really pleased with the squad we have named today, and we have faith that they can step up to the challenge," Robertson said.
Those who did not travel to the Gold Coast last week due to injury, but who should soon be right are first five TJ Va'a, fullback Jordan Trainor, lock Fin Hoeata and No 8 Hapakuki Moala-Liava'a. Shaun Stevenson will join the squad after the May 27 Chiefs-Waratahs game. Waikato's Sosefo Kautai comes into the squad as the fifth prop.
The New Zealand Under 20 squad assembles in Mt Maunganui on May 27 ahead of a game against the Chiefs Development side on Monday May 30.
The World Rugby Under 20 Championship kicks off on June 7 with the final to be played on June 25.
World Rugby Under 20 Championship, June 7-25, Manchester, England
NZ Under 20 match schedule (local times):
Pool A matches
Tuesday June 7
New Zealand v Georgia
1945 hrs
AJ Bel Stadium, Salford
Saturday June 11
New Zealand v Ireland
1330 hrs
Manchester City Academy Stadium, Manchester
Wednesday June 15
New Zealand v Wales
1730 hrs
AJ Bel Stadium, Salford
Semifinal playoffs will be played on June 20 ahead of the June 25 final.
The New Zealand Under 20 squad is:
FORWARDS:
Props
Ayden Johnstone - Waikato
Shaun Stodart - Otago
Sean Paranihi - Canterbury
Alex Fidow - Wellington
Sosefo Kautai - Waikato
Hooker
Leni Apisai, captain - Wellington/Hurricanes
Asafo Aumua - Wellington
Lock
Quinten Strange - Tasman
Hamish Dalzell - Canterbury
Lock/loose forward
Isaia Walker-Leawere - Wellington
Fin Hoeata - Taranaki
Loose forward
Mitchell Jacobson - Waikato
Luke Jacobson - Waikato
Dalton Papali'i - Auckland
Marino Mikaele-Tu'u - Hawke's Bay
Hapakuki Moala-Liava'a - North Harbour
BACKS:
Halfback
Jonathan Taumateine - Counties Manukau
Sam Nock - Northland/Blues
First five-eighth
Stephen Perofeta - Taranaki
TJ Va'a - Wellington/Hurricanes
Midfield
Orbyn Leger - Counties Manukau
Jordie Barrett - Canterbury
Patelesio Tomkinson - Otago/Highlanders
Midfield/wing
Jonah Lowe - Hawke's Bay
Malo Tuitama - Wellington
Outside back
Caleb Makene - Canterbury
Shaun Stevenson - Waikato/Chiefs
Jordan Trainor - Waikato/Blues