Legend says that there are many different universes existing out there, somewhere. Legends say there are many different dimensions existing out there, somewhere.

What isn't said though is that one such alternate universe has a dimension all for Legendary Pokémon only.

...well, that's because it's never happened before, and it's going to start happening now.

As a certain quadruped stood atop a mountain, alone, it gazed upon another hill in front of it with a wide flat surface. "(Hmmm... this might work.)"

Stomping its feet, the earth shook and a large mansion slowly surfaced at the surface. The dimension quaked for almost a minute, before soon the entire building was overground.

"(Yep. Perfect.)" It hopped off the peak of its own mountain, soaring over to the mansion and examining it. "(Looking good. No problems so far. This is quite acceptable.)" It clopped inside the building- several shards of broken vases or glass and random chunks of debris littered the entrance room. "(...right, what was I expecting?)" It did, after all, just pulled an entire mansion out of thin air while causing a huge earthquake.

Luckily this entire dimension was one it created by itself and thus no life currently existed here, and therefore nothing was harmed. Probably. Hopefully. Most likely.

Not that it really cared, all problems can be fixed later anyways.

The quadruped stomped its feet again, and all debris disappeared while all broken artifacts were restored to its proper state.

"(Alright. Good enough. And now...)"

Letting out a radiant glow, it unleashed an enormous amount of power. At first nothing seemed to happen, but slowly random glowing orbs appeared within the huge room. Each glowing orb slowly dissipated, leaving certain Legendary Pokémon on the floor that were extremely confused.

"(Whuh... what's... where are we?)" a certain blue quadruped dragon asked.

Its counterpart, a pink bipedal dragon looked around. "(I don't recall having such an ugly place in here.)"

"(Rude,)" Arceus said. Then again, Legendary Pokémon had their own standards. It sighed and floated up, gathering everyone's... uh, every Pokémon's attention with a bright light. "(Attention to all legendaries here, attention please,)" it said.

They all turned to their creator, expressions clearly demanding answers.

"(Right. I have created this dimension for my leisure, and brought you all here for a reason.)"

A certain ghostly creature with a body composed of darkness raised its hand. "(And that is...?)"

"(I'm getting there, Darkrai,)" Arceus said. Sighing again, it looked around to make sure nobody else had been planning to speak. "(Anyways, I decided to create this dimension separate from the world's main dimension in order to allow all of you legendaries to live in peace.)"

They blinked.

It rolled its eyes. "(Basically, because some complain about being lonely, I've brought all of you together so that we can relax as a group.)"

"(N-now hold on, I didn't say that...)" a certain eight-legged ghostly dragon complained.

"(I didn't state any names, Giratina.)"

"(...)"

Its buddy dragons Dialga and Palkia snickered. "(Heh. Lonely, huh?)"

"(Poor Giwatina. Wants company.)"

Giratina growled at its two acquaintance. "(S-shut your damn maws...)"

Nodding again, Arceus decided to address another matter. "(Now, I have also did some considerable thinking and figured that maybe, us legendaries are deserving of emotions such as love too. And perhaps some other unspeakable desires.)"

"(...I don't like where this is going,)" an evil-looking flying bacon... uh, avian muttered.

"(As such, I shall grant you all the ability to transform into a human version of yourselves.)"

The avian's opposite, a large blue deer with huge antlers, smiled. "(I like where this is going.)"

"(First, I shall demonstrate.)" The creator of the universe then illuminated the entire room with its own body again, as its form became smaller. The light only affected a few of the legendaries, forcing them to close their eyes, but a majority simply stared as their creator's body became that of a mature human girl.

She had long, grey hair, two sharp tufts protruding and covering her respective ears. Beneath her face were arm warmers and breast pads of the same grey color, and a long shirt-like fabric a darker shade of grey. Some sort of weird yellow accessory were attached to her waist area, identical to the holy ring that had been part of her previous Pokémon form. Lots of grey fur acted as stockings, covering part of her legs, and a long beautiful grey tail stuck out her behind. Finally, her feet wore a pair of white high-heel shoes, its heel painted yellow.

The goddess smiled. "...how do I look?"

"(Like a filthy human!)" Palkia roared. It promptly shut up when Arceus sent it a glare in her human form. "(...w-well, not bad.)"

"Exactly. I'd also like to note that all the designs for your human forms are not mine, but borrowed," she said. "It's from something humans developed called... um... Moémon, I believe."

One of the... whatever. You can probably all guess their identities anyways, so I'll just start referring by names.

Azelf raised its small stubby hand. "(Why are you female?)"

Arceus blinked. "...well, that's what these 'Moémon' designs all are. Females. Apparently."

The claim was faced with some opposition, most notably from three deities floating on clouds.

"(All female!? That's ridiculous!)" Tornadus shouted. "(What about us!? We're all males! We have pride!)"

"(I second that! I won't stand being female!)" Thundurus chimed.

Arceus simply shrugged, their problems the least of her concerns. "I'm afraid I cannot help with that," she simply said.

Their jaws dropped, to her amusement.

The mediator of the Forces of Nature sighed. "(Just let it be, you two. It probably isn't that bad,)" Landorus muttered.

Clearing her throat, she smiled. "Now, first of all, before you all start transforming... I want to say, in case anyone has things left to do in their beast forms, I'll give you all... say, ten minutes to finish whatever you may have stopped doing before I summoned you."

They stared at her, confused.

"...to be more specific, it's because as the first day staying here, I would like all of you to stay for the rest of the day and perhaps get to know each other... oh, speaking of which." Arceus suddenly floated towards a giant white lion. "Uxie can explain things to everyone later, but please welcome our latest acquaintances. This is Solgaleo."

"(...um. Hi.)"

She then gently floated to a giant bat-like deity besides the lion. "This is Lunala."

"(...greetings.)"

Then, she went back to the center of the room. "And... well, there's more, but you lot can most likely tell who is new, so if you have any questions, ask later. Any questions?" She looked around- they were still currently confused about their situation. "...good. Your ten minutes for beast-form freedom starts... now. Will yourself to teleport if you need to do something in the real world."

Immediately, a majority of the legendaries disappeared. She snickered, and floated away to do whatever she could possibly be thinking of.

Azelf remained where it had been, looking around the room. "(This huge place... I'd love to explore here...)"

Its pink friend Mesprit floated to it. "(You are not going to return to do any unfinished business?)" it asked.

The blue-headed Lake Guardian shrugged. "(I haven't had anything to do for years,)" it replied.

"(Same. I guess I'll hang with you for a while.)"

"(I'm thinking of looking around this mansion. Sir Arceus... well, Miss Arceus now, must have created this with their... uh, her amazing powers! It's got to have amazing stuff somewhere, right?)"

Mesprit chuckled. "(Ah, yes. Excitement. Alright then, let's explore for the ten minutes we have left!)"

Azelf turned around. "(Uxie, what about... oh, they're not here.)"

The guardian of emotion shrugged. "(Unfinished business. Oh well. Shall we get going?)"

"(Mmhm!)"

...and that was pretty much how the Mansion of the Legends' first day actually started.