Campbell Soanes took 3-19 off 6.3 overs for Northland.
Opener Tommy Litchfield put several of the Poverty Bay bowlers to the sword with a whirlwind 68 not out off 41 balls – 60 of his runs coming in boundaries.
Paceman Johnny Gray continued his impressive form with the ball in picking up the only Northland wicket for 12 runs off his four overs.
Waikato Valley’s Logan Hickey top-scored over the four games in round two. He made an unbeaten 71 off 101 balls, including five fours and a six, against Hamilton.
No 9 batsman Finn Bell smashed 44 off 23 (three fours, two sixes) to help his side to 248-7 and they then rolled Hamilton for 142 for a 106-run victory.
Scoreboard for round two
Northland 89-1 in 10.3 overs (Tommy Litchfield 68 not out; Johnathon Gray 1 wicket for 12 runs in 4 overs) def Poverty Bay 88 all-out in 30.3 overs (Taye McGuinness 32; Campbell Soanes 3-19- 6.3, Noah McKay 2-11-4, Daily Dickeson 2-28-5) by 9 wickets.
Counties-Manukau 63-5 in 16.1 overs (Harkamalpreet Singh 20; Brydon Rhodes 2-7-4.1, Louie Austin 2-30-8.1) def Northern Districts Māori 61 all-out in 18.1 overs (Caleb De Bruin 27; Darren Theart 3-16-4, Trent McVeigh 3-16-5, George Williams 2-11-6, Sterling Speedy 2-14-3.5 overs) by 5 wickets.
Bay of Plenty Coastlands 141-6 in 35.3 overs (Arish Aryal 40, Flynn Warren 30, Sam Cross 21; Jonah Funnell 2-22-10) def Bay of Plenty Lakelands 138 all-out in 49.4 overs (Riley Kusabs 22; Nihar Pramar 3-12-5.4, Matthew Dow 2-4-6) by 4 wickets.
Waikato Valley 248-7 (Logan Hickey 71no, Finn Bell 44no, Andy Rogers 35, Maccy Maber 22; Ishi Singh 2-34-8, Aditya Gulla 2-35-10) def Hamilton 142 all-out in 36.5 overs (Taine Grover 33, Aditya Gulla 28; Joe Lang 4-39-10, Jackson Brown 3-20-10, Finn Bell 2-14-4) by 106 runs.