Seriously, how are you all missing out on Ghost as the most obvious candidate for Lunaala?
It's the type most associated with actual night-time, it's the creepiest type (whereas Dark is just about being mean) and the legendary looks like a skeletal bat-like creature formed like a moon. It would be shocking if Lunaala is not Ghost type.
summed up my thoughts on their types here:
http://pokehype.blogspot.co.at/2016/05/sun-and-moon-legendaries.html
Its a interesting theory, that is for sure. That said, my own predictions with the Legendary's typings is the following:
Solgaleo:
Fire/Electric
Fire/Psychic
Fire/Grass
Type explanations/reasoning - Solgaleo:
Fire/Electric:
Same as your definition on the point that the Sun has a natural electromagnetic field. In fact, this would be my preferred type if Solgaleo was considered to be the full, true embodiment of the Sun, being one of those Pokémon capable of shrugging off Water attacks, yet also be weak to it, because Fire/Electric has no resistance against Water.
Fire/Psychic:
This type has been speculated a lot for a while by other people. I can say I'd kind of dig it, but only for the sole reason that Psychic as a type also associates a lot with cosmic concepts. The second reason could be that the mark that lits up between its eyes is like a third eye, but this is pure guessing. That said, the type would fit as well, because Psychic as a type alone isn't often made very obvious in one's design.
Fire/Grass:
Fire/Grass is my second most preferred type, which is more focused on associations, rather than appearance. I chose this combo mainly because it was a new type combination not yet used in the franchise, and if there's anything I learned, is to expect that GF is unpredictable with their allocation of typings and that appearance alone doesn't always dictate one's type by sight. In addition, I have put
Fire/Grass because of several other assocations:
Note: The following below is just my own fan reasoning to make
Fire/Grass more appealing and shouldn't be taken as actual points for Fire/Grass typing.
1. Its mane looks like a detailed flower, incorporated with a five-pointed star. Could tie in with the
Cosmos flower species, being part of the Sunflower family.
2. The Grass type itself is a reference to life in general, but also because plants, such as vegetables and fruit are healthy for one's person.
3. Flowers are a common aspect of Hawaii, and if Solgaleo is Fire/Grass, it goes well with the overall tropical theme of the region.
4. The Lion is often mistakely called "
King of the Jungle". Also, Lions are native in the savannah, a type of grassland, befitting Solgaleo's speculated Grass-type.
5. The Fire Element is associated a lot with the passion and power of life, and the sun's light is essential to life in general.
6. Both Grass and Fire types, most of them of them anyways, can learn Solarbeam, a Grass type move, which in turn, ties it automatically with the sun.
As for Lunaala, I agree with the Ghost typing. It makes a lot of sense themamatically wise. But I don't see Ghost/Flying working that way, although their type colors still technically work with Lunaala's own color scheme. That said, here is my own play on the Ghost type, as well other possibilities:
Lunaala:
Ghost/Water
Ghost/Ice
Ice/Dark
Ice/Flying
Type explanations/reasoning - Lunaala:
Ghost/Water:
Ghost type is mostly associated with actual darkness and the occult as you already pointed out. Water, in turn, represents the moon's power to control the tides.
Ghost/Ice:
Ghost type is mostly associated with actual darkness and the occult, whereas Ice represents the fact the moon has deposits of lunar water ice, and both water and ice is known to reflect light. This would also tie into the fact that the Moon is known to reflect sunlight as moonlight. More, the type colors of Ghost and Ice fits with Lunaala. Furthermore, what could serve as an extra support for this type, is the official Pokémon site of Sun and Moon itself. There, at the background that showcases the sun on one half, and the moon on the other, if one looks careful, both these halves are radiating energy. The Sun radiates solar energy, and the moon appears to radiate waves of light akin to the Aurora Borealis, suggesting a Ice-type perhaps.
Ice/Dark:
Same thing with Ghost, Dark-type can also be associated with darkness, but isn't as obvious, whereas Ice represents the fact the moon has deposits of lunar water ice, and ice is known to reflect light. This would also tie into the fact that the Moon is known to reflect sunlight as moonlight.
Ice/Flying:
More focused on the fact that bats fly, whereas Ice type has the capability to reflect light, reflecting the Moon's natural ability to reflect sunlight. Also, once more, the moon is said to have lunar water ice, strengthing the reflective powers of the Moon. More, the type colors scheme of Ice and Flying fits with Lunaala.
Aside my speculations, other people tend to use Fairy, as the type is associated with the moon. While at first I was open to the possibility because of the latter reason, asthetically, I'm not seeing anything that makes it fit with Fairy . But that is my own opinion on the matter. For the rest, this will be my final speculation in terms of what I think what their types will be. I think I covered all my bases, and as such, I would be happy with any of these types. If they don't happen to be any of these types, it won't matter to me in the slightest.
More, I chose the above types with the purpose that I hope they will have a counter-balancing effect to them - that they're both effective against one another, unlike Xerneas and Yveltal, where Yveltal got the short end of the stick. For the counter-balancing idea to work, I have put the types in the following relationships:
Fire/Grass <-> Ice/Flying
Fire/Electric <-> Water/Ghost
Fire/Psychic <-> Ghost/Ice or Dark/Ice
Extra:
For the one called
Marshadow, of which people think its the third Legendary and likely represents the Eclipse effect, I'm in the camp of it being a
Dark/Poison type as many people have pointed out. Others seem to think its a
Dark/Water type, which is also cool. Another possible type someone pointed out on another forum is Marshadow being a Dark/Rock type, but only if it happened to be a planetoid of some sort. That said, either type combo would work, if one accepts the speculation of the Legends possibly having a Counter-balance relationship in the following manner:
Dark/Poison Type or Dark/Rock Type:
Beats Fire/Psychic, Fire/Grass and Ghost/Ice
Dark beats both Psychic and Ghost. Poison beats Grass and isn't resisted by Fire. Rock type beats Fire and Ice types.
Dark/Water Type:
Fire/Electric and Water/Ghost
Water beats Fire and isn't resisted by Electric. Dark beats Ghost