Pokemon Theory - Dialga and Palkia are Ultra Beasts?

So, with the release of the Diamond and Pearl remakes coming closer and closer (at least, we think so...), I've been wondering what sort of extended lore the remakes will give us, and I've come up with a theory - Dialga and Palkia are Ultra Beasts, or something akin to Ultra Beasts. I've come up with points for and against this, and remember, it's just a theory, so don't bash me too hard, and I'm not saying that they definitely are UBs, just something similar to UBs. Also, I'll be referring mainly to game lore with my theory, as anime and manga lore aren't always canon with the games, which should be considered the official canon for any Pokémon lore.

Points For:

• Dialga and Palkia come from different dimensions, and are summoned to the dimension where the player exists via portals created with the power of other Pokémon. Much like how Cosmog (and Solgaleo/Lunala) can create Ultra Wormholes, the Red Chain made from Mesprit, Uxie and Azelf's crystals can create wormholes that summon Dialga and Palkia.
  However, it is unknown whether Dialga and Palkia have the power to leave this dimension on their own. (Palkia probably does due to it's spatial powers)

[*]In the Generation 3 remakes, the lore revolving around Mega Evolution was expanded upon. Mega Evolution was a concept introduced in Generation 6, so it's possible that Ultra Beasts and Ultra Space, a concept introduced in Generation 7, will be expanded upon in the Generation 4 remakes.

• However, Mega Evolution was a battle mechanic, while Ultra Beasts are a story mechanic. It's possible that Z-Crystals are instead expanded upon, as they are also mechanic. (An interesting point to this is that the basic type Z-Crystals will change Arceus's (and Judgment's) type, much like the Elemental Plates.)

[*]Team Galactic has a strong tie to space, and their goal is to capture Dialga and Palkia in order to create a new dimension, so it's possible that Dialga and Palkia's dimensions, both the ones they come from and the ones they create are similar to Ultra Space - belonging outside of the dimension of the player.

• However, this contradicts the first point I made, where it is unknown whether Dialga and Palkia have the power to leave their own dimension. It would make sense that a Pokémon capable of creating new dimensions could leave it's own dimension, and the Red Chain summoning method is just a way to keep them contained.

[*]The UBs all have very eccentric designs, as do Dialga and Palkia.

• However, lots of Pokémon have eccentric designs, so this one's kind of a half-point.

Points Against:

• The Ultra Beasts come from an explicit "alternate dimension", while Dialga and Palkia just come from their "own dimension", which is neither confirmed not denied to be alternate dimensions.
  However, since most dimensions in Pokémon that aren't the one where the player exists have been referred to as "alternate" (both with the wormhole leading from the player's save file to another one in ORAS's Delta Story, and with Ultra Space in SuMo), it's still possible that these dimensions are alternate versions of the player's, but with only Dialga or Palkia governing them. (Note: The anime canon lists them as being "worlds" rather than "dimensions", but the implications are the same)

[*]Dialga and Palkia were created by Arceus, who is said to be the "god" of all Pokémon, and would therefore place Dialga and Palkia under the title of "Pokémon", not "Ultra Beast".

• However, Ultra Beasts are still Pokémon, they're just extradimensional, so it's possible that Arceus created all the Pokémon from every dimension within the game's canon, which would include Ultra Beasts, and then have Dialga and Palkia (and by extension, Arceus) under the same or a similar classification as the Ultra Beasts.

[*]Dialga and Palkia have been created by Arceus in the player's dimension, as seen in the Sinjoh Ruin cutscene in HeartGold/SoulSilver.

• This doesn't confirm or deny whether Dialga and Palkia can also created in an alternate dimension, it just means they can definitely be created in the player's dimension.

[*]Dialga and Palkia (and by extension, Arceus) being Ultra Beasts doesn't fit within the Pokémon timeline.

• However, remakes have changed or added timelines to the official Pokémon canon before, so there's still a chance they could be UBs, or related to UBs. A great example of this is how XY stated that Lucario was the first Pokémon to achieve Mega Evolution (this was in the form of a Kalosian legend), whereas ORAS changed that completely and instead stated that Rayquaza was the first Pokémon to achieve Mega Evolution (this was in the form of Draconid history), so it's possible for brand-new lore to be changed even within the same Generation. (Note: The use or absence of Mega Stones is irrelevant - the Lucarionite causes Lucario to evolve, while the Meteorite causes Rayquaza to evolve (as long as it knows Dragon Ascent) and therefore both Pokémon technically have "Mega Stones".)

[*]"Dialga and Palkia can't be Ultra Beasts!!1! Stop ruining my childhood nostalgia prAISE LORD BIDOOF LMAO"

• "It's just a theory, nobody knows what could happen in the DP remakes. I could be right, or I could be dead wrong, we'll just have to wait and see."

So, that's my theory! Feel free to discuss down below, but please don't attack me for sharing my ideas.

EDIT: Giratina can also be added to this theory, however I didn't include it previously because I was talking about DP remakes, and Giratina never crossed my mind.

 

I was planning to include Giratina in the theory, however I decided to dismiss Giratina. Now that I think about it, Giratina would also apply because it rules over the Distortion World (also known as the Reverse World) could be considered an alternate dimension to the one the player lives in. I'll update the theory