@Yobobojojo: There's also ambiguity as to when time supposedly stops in the timeline, if it stopped at all. The audience is to believe it stopped because Yugi observes nobody's on the streets today, & Jaden notices an analogue clock reading exactly 9, & we never see that clock again. Jaden's reaction to it is to conclude "Time is stopped. I get it! This is a special time space for me and Yugi-san!"
Everything following that is part of their duel, or something a duelist says/does. Other than the audience being expected to believe what the characters say, there's a lack of confirmation of the time stop after that clock.
Time being stopped wouldn't make sense, at least, not before that clock is noticed, because....
The paper showing Yugi won Battle City, implying it happened, Yugi's flashback of sleeping & having a prophetic dream from Kuriboh, that paper flying onto Jaden's leg from the wind, Yugi saying goodbye to his grandpa... who's offscreen & voiceless, so he can't be affirmed to be timestopped or not, but unless Yugi doesn't know Solomon/Sugoroku is timestopped, why would he say goodbye to him?
And the feat being Yugi's is questionable, too, because:
Winged Kuriboh leads Jaden to Yugi. Yugi says about it "I gave you a card three years ago to test whether or not you'd become a worthy enough duelist to possess it.", & has Jaden hold it over Yugi's cards. 2:16, Yugi's cards glow, then Winged Kuriboh does. Around 2:19, we can see WK glowing, but not Yugi's cards... then Jaden gets transported.
WK's feats aside, it is a Duel Spirit, & one Yugi gave Jaden a 3-year worthiness-of-ownership test for. Wouldn't it be reasonable to assume it has some kind of power, then? And the Duel was to help Jaden find something he'd lost.
Because of the dialogue "That card will guide you to the strongest of all Duelists!" "Strongest Duelist? One besides you?", we can assume it isn't Atem, since Yugi calling himself the strongest duelist rather than the King of Games is a bit odd, especially if he means himself, why'd he involve Atem in the duel then, even partially?
Millenmium Items often make illusions or show things. Transporting people places isn't stuff they do often. Yet not only is Jaden started pre-duel, but when the duel ends at Neos attacking Slifer, Jaden ends up back in the present, in a desert far from any of the previous 2 locations, where a bird caws overhead, affirming it's the present & time flows. & it doesn't seem like that relocation was Yugi, Atem, Jaden or Yubel's doing.
Oh and Yugi didn't have his Millennium Puzzle anyway.
So if he was reason to believe this wasn't Atem, & there was no Millennium Item involved, then who seems more reasonable to assume did the magic? Semi-regular kid Yugi Muto, or the Duel Spirit, Winged Kuriboh?
Again, it's ambiguous.
Lastly, I'm not sure this would be a Low 2-C feat; The timeline Jaden is sent to is AT BEST, Solar System Level because Yugi's statement implies there's a day-night cycle, requiring a sun, but we never see any sun nor stars. There's clouds in the sky, but the area is mostly just a small portion of Domino City.
