Nicholls, only in the side as cover for the injured Ross Taylor, made 82 in just his sixth ODI.
With another new face of New Zealand cricket, Mitchell Santner, they produced a 79-run stand for the seventh wicket after New Zealand were in a perilous state at 99 for 6.
Tailenders Matt Henry, 48 not out, and Mitchell McClenaghan then bludgeoned Pakistan for 73 off 33 balls before McClenaghan took a vicious blow to the head and retired hurt on 31 with one ball remaining.
Before the late charge, Pakistan had been on top with Mohammad Amir picking up three for 28 before he hobbled off after injuring his left leg at the start of his ninth over.
The 23-year-old, still working his way back into favour after a five-year ban for spot-fixing, was given the arduous duty of toiling into the strong Wellington wind in his first spell.
Two of his first three deliveries were wides as he struggled to get to grips with the conditions but once he settled the full range of skills in his armoury was deployed.
After losing the toss and being sent into bat New Zealand saw their prime batsmen fall cheaply, leaving the 24-year-old Nicholls to make the most of his opportunity.
Openers Martin Guptill and Tom Latham, were both out for 11, in a three-ball burst.
Mohammad Irfan, stung by being hit for six by Guptill, came back with a bouncer that was hooked to Wahab Riaz at long leg.
Kane Williamson and Nicholls added 45 for the third wicket before Mohammad Ali claimed the next two wickets in the space of three balls.
The sole right-armer in Pakistan's pace armoury had Nicholls dropped on 15 by Mohammad Hafeez at first slip with his second ball.
But luck went his way in his fourth over when he bowled Williamson (10) and Grant Elliott (0) to reduce New Zealand to 70 for 4 after 16 overs.
Amir had Corey Anderson (10) and Luke Ronchi (5) both caught behind before Santner joined Nicholls to provide some backbone to the innings.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
