Bakugan setting

based around its narrative and the kind of concepts it was going to play with in episodic form.
Bakugan are a net term for races any civilizations within my bakugan multiverse who have decoded the holo sector principal and applied that to travel across the multiverse.

The holo sector principal is the threshold of complex information that can be transmitted from one universe to another, and is normally very very small, an animal larger than a mouse would not be normally able to go from one universe to another.

The Bakugan ball is the almost invariable solution to this, a technological feat by which memories and detailed properties of an individual are encoded onto sheets or cards small enough to "fit" through the HSP threshold, and the essential core of the individual is reduced to a spiritual machine core the size of a gold ball. The bakugan individual is then ejected through their culture's equivalent of a "launcher", and their "cards" are sent with them. Once on the other side, they can use the inherent magical properties of their spirit to reform their bodies through the use of the cards, popping open out of their cores and returning to full form.

This vital piece to their body-reformation becomes a problem when bakugan try to travel to earth, which is almost comepletely barren of even the most basic of magical energies, and so many of them have to rely on chance encounters with humans in order to reform, by borrowing the life energy of a human "bakugan user", who are none the wiser to what is happening. To the humans, cards and balls fell from the sky, and with these cards and balls a game was formed. It was not until the monsters started reforming and doing actual damage to the world that humanity realized there was more to them.

the only reason they can reform is through people while in earth's universe, so they are constrained to basically waiting until a living being from earth touches them to even become animate, let alone try and use gate cards to rebuild their former selves.

Normally they could fly and collect their cards on their own, but the ambient magical forces of the earth universe are so weak that they can only sustain their own identity, unable to move or talk until the only source of ANY magical energy, native life, touches them.

When they are touched, they keep the energy borrowed for a small time, but it leaves their body fairly fast unless constant contact is maintained, so unless the human actively rides on them, they soon after reforming turn back into their bakugan balls.

most of the time, they only actually play along with the "game" in order to talk in their own language. It is very rare when two bakugan actually fight legitimately while on earth, but when they do is when property damage starts racking up in the millions.

I have narrative conflicts planned around this
Some revolving around the pros and cons of interfering with cultures less technologically developed than your own,
Some dealing with the problems that could arise with the ability to trade memories, and the existential problems that could entail,
and some dealing with the conflict between cultural and individual identity, and how tools can shape the interplay between them

an example:
At some point in the story, humans are going to start developing their own "bakugan", in the form of the more humanoid and robotic bakugan like robotallion, and start sending them to other worlds to colonize. One of the moral dilemmas that the lead bakugan would face is the fact that they have irreversibly influenced the future of earth by simply landing there and allowing their technology to be reverse-engineered, rather than developed at the rate it would have normally done without interference.

Because of this, actions are made by the unprepared, not fully versed in the physical and political problems that arise from universe hopping and colonizing, and the lead bakugan/human team must come to terms with the responsibilities that would follow.

elemental "tribe" means nothing, races come from different universes, and usually each world which magic is strong manifests the six elements. All true dagons and wyvern bakugan are part of the "dragonoid" race, and originate from the same world,  all arthropod bakugan come from the same world, etc.

Universes are tend to manifest some ratio of the three following as they develop: Ecotech, Cybertech, and Magitech, and are categorized by which ones happen the "easiest", or in other words which ones civilizations in that universe seem more driven to develop. All universes manifest all three, but the ratio of which ones happen with greatest ease is rarely balanced between the three.

Ecotech the phenomena observed of mutation and conventional organic life forces. Basically biology, but it's a little more widespread than just biology.
Cybertech is the phenomena observed of engineering feats and the ease of wholly mechanical beings to come into existence. Note that this governs "natural" robots too, like golems.
Magitech is where the six elements come from, it is the force of spiritual life and abstract beings. Tentaclear's people and those like it are an almost exclusively magical race of Bakugan.

Dragonoids come from an almost perfectly balanced universe, but earth is almost exclusively an ecotech/cybertech universe, and seems to be so low on the magical forces that life in it only just barely has souls.