Round 2
Honestly, Arceus seems like the biggest threat for Goku out of anyone here with the given rules, it should've been put at last. Anyway, all hax Arceus hax are already 4-D and we already went over Goku's so no changes here. Though I want to clarify that one application of a certain ability doesn't mean that they can do all possible applications you can think off, so Arceus's hax will be assumed to be only the specific types of abilities it nullifies for the other pokémon, and if said abilities do or do not coincide with what Goku can do, and if it can or cannot affect him due to being on a similar level of power, I'll take it into account.
AP-wise, this might be surprising to you, but XV Goku's actually bigger than Arceus's due to the "timeline per action" and "timeline per possibility" being a much, much bigger number than countless universes with multiple timelines. A single timeline is qualitatively superior to even infinite spatial universes. In fact, I think the terms linked on Goku's page talked about it, let me see... yeah, there it says it, it's not exactly how it goes, but I'd rather use the terms used for the pages.
"Magniverse is the Grandfather of Multiverses. Within a Magniverse are uncountable possibilities of Multiverses each existing at once, with each Multiverse creating trillions of alternate realities in any single instant. The best example of a Magniverse's sheer number is when an "Infant" Magniverse was measured at a record low amount of timelines (7 Trillion) and in a literal instant, that number rose to several Decillions from the viewpoint of 9th Dimensional Humans."
Oh... wait a minute...
"At least Multiverse level, possibly Multiverse level+ (Is the only one capable of making Beerus take a "mortal" seriously. Should be far superior to Demigra with Toki-Toki's Egg, who could destroy an amount of "Magniverses" unfathomable to any mortal or godly description)."
Yeah, no contest. Goku one-shots Arceus lol, moving on.
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Alright, I know that AP doesn't always mean insta-win, I'm the loli so I know about it uwu
Arceus's hax is unimpressive when compared to Goku's. Arceus dominates Dialgia, Palkia and everyone else due to its dominance over the concepts they embody and the sheer power difference he possesses, and Goku can too toy with concepts, in fact, Arceus is lucky to have Goku's hax restricted to 4-D, as he's on a league far bigger than Arceus when it comes to conceptual manipulation listed on their pages.
So now Goku and Arceus are on the same level when it comes to conceptual shenanigans, but look at what we have here:
It nullifies the opponent's attacks, except damage, in other words, weird haxy attacks gets negged, but a punch to the face doesn't, and Goku only needs to gently tap Arceus and it'll explode due to the massive AP he has. You could argue that that's a FIGHTING Type move and therefore an "Elemental" attack, but...
Goku resists power null either way.
Goku one-shots Arceus with little difficulty. Next.