So long as it is respectful.
Twelve months ago England advanced to the halfway line to the delight of an 82,000 crowd at Twickenham before being edged 24-22, while in 2019 they lined up in a V formation before crushing the All Blacks 19-7 in the World Cup semi-finals.
Extra spice was given to last autumn's Hillary Shield showdown when prop Joe Marler, who has now retired, stated the haka is "ridiculous" and "needs binning", provoking a furious backlash in New Zealand.
The build-up to the rematch has been less controversial but Robertson understands the sporting theatre provided by opponents responding to the Maori war dance.
"The haka's setting a challenge and if someone does something different, respectfully, you welcome it," the All Blacks head coach said.
"There are always rules of engagement around it, but they know what we're going to do. If you haven't planned or covered off what they're going to do, it can be unexpected, and that's part of it."
A pivotal moment in Saturday's collision will be the battle between the benches, with New Zealand including Samisoni Taukei'aho, Wallace Sititi, Anton Lienert-Brown and Damian McKenzie among their reinforcements.
England have stacked their replacements with five British and Irish Lions forwards, with the bomb squad proving decisive in toppling Australia and Fiji so far this autumn.
"The finishing of Test matches is critical and whoever you bring on needs to make an impact," Robertson said.
"We've got good cohesion after a couple of Tests. A lot of the combinations have played together and we have a good, powerful bench to get us home."
New Zealand will be led by Scott Barrett after the second row recovered from the wound needing 12 stitches sustained against Ireland at the start of their end-of-year tour.
"It's remarkable once you saw Scott's cut, he's got good healing powers. We've had to pull him back a bit in training. He's ready to go," Robertson said.
Meanwhile, Maro Itoje insists England are ready to emulate the 19-7 victory in 2019 even though they have failed to register a win since.
Now they are in a midst of a nine-Test winning run and faced with the opportunity to deliver a statement victory that will define their 2025.
"At that stage of the journey of the team in 2019, we were ready for that sort of challenge," England captain Itoje said.
"We felt that if we were aggressive and accurate in what we do, we would be able to get them.
"It was one of those weird games where they had periods on top, but it felt like there was only one outcome of that game. Hopefully we can do something similar this weekend.
"This is a moment that we are prepared for and we're capable of doing the job. We're ready."
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