Rapid: The characters' own dialogue refer to it as Time Travel, IIRC.
The only affirmation of time being stopped is Jaden's speculatory dialogue after Yugi observes no one in the streets -at roughly 9 AM- & Judai sees the clock at that exact time.
It's speculatory because everything else in that duel involves the duelists or the duel, & the background scenery is static; Buildings & the like.
AFTER that speculatory dialogue, there's nothing to back up Jaden's assumption. We don't see the clock again.
Furthermore, it's highly suggested to be time travel since it's confirmed to be 3 years ago & the paper shows news of Yugi having won Battle City. Not to mention he still has the Millennium Puzzle, which was gone after the Ceremonial Duel. The Yugi who Jaden meant before getting sent to "Domino City" for their duel DIDN'T have a Millennium Puzzle.
So there's good reason there's reason to believe it's time travel.
It's also more in line with typical MI powers to make illusions, like with Dark Games, which are illusions a lot, especially in the manga.
If IT is a created timeline -as opposed to time travel with time stop- backed in, it's questionable if it's 2-C or even 3-A.
If we assume that timeline was created, we have to know what's in it.
The fact that the wind that blew the paper existed in it suggested time does move in it, as does reporting on past events -Yugi winning Battle City- Yugi saying goodbye to his grandpa as he leaves the game shop, & Yugi claiming to have dreamed last night.
So what's in this timeline?
A small portion of Domino City, a blue sky, & assuming Yugi had his dream at night, a day night cycle, suggesting at least a sun, possibly a solar system. We never see any stars, nor do we actually see a sun in the sky, though.
If it was made, there's little confirmation it actually IS an entire universe's worth of matter that was created. Not enough to be 2-C.
And either way, it's still more suggested to be time travel+time stop via dialogue.
Not only that, it's a very brief timeline, since it ends when Neos attacks Slifer, & then Jaden ends up in a desert somewhere, suggesting he was transported.
And finally, it's weird to assume Yugi performed the feat in the first place, or was even entirely responsible. Winged Kuriboh, a duel spirit with actual power in the series lead Jaden there.
Yugi revealed he'd given Jaden a 3 year test to see if he was worthy of owning Winged Kuriboh, then said to hold Winged Kuriboh's card over some cards in Yugi's deck. WK's glows, then Jaden is transported.
Now, which is more likely to have magical power? A duel spirit that lead Jaden to where this happened, whom the King of Games knows of & figures you need such a huge test to be worthy of, the card of which glowed, suggesting involvement of it in the feat....
Or a guy without his Millennium Puzzle? I'd side with WK.
And it still wouldn't match up with the powers MI have shown before. Most don't create timelines/time-spaces/universes. The closest is the Memory/Millennium World & that required Atem's memories, Bakura's Millennium Ring, the Egypt board he built, the Millennium Puzzle AND Zorc, who's stronger than the Egyptian Gods!
The MP doing anything on that scale on its own -especially after the time of the Ceremonial Duel- is highly questionable, & IT'S NOT EVEN THERE FOR THE FEAT.
Also, none of the cards shown among Yugi's "deck" when the feat is performed even include Slifer, nor any other Egyptian God, despite including several of Yugi's notable cards. Despite Slifer being super symbolic & important to this. So Yugi's deck would also be performing a feat well above any of what the other cards did without even having an Egyptian God.
And no he doesn't have reason to have the EGs at the time because they fell into a chasm after the Ceremonial Duel.