Actually in French Moon is "Lune" but I like the idea. Maybe have it as part of the name! For the third one incorporate "Terre" into the name too.
As for the types, you've suggested Fire and you've suggested Water and Rock.
My idea:
Not Dragon as the types. That's just really boring. My suggestion is:
Fire/Electric Sun related Pokemon. Electricity reminds me of brightness and Fire is obvious.
Water/Rock Moon related Pokemon. The tides and what the Moon is primarily made of.
Ground/Grass Earth related Pokemon. Earth- Green and the word Earth itself.
That way they're types not used too much (aside from fossils, there aren't too many Water/Rock types) and are still related to the things they are embodying.
I also really hate big bulky legendaries as the big ones you get. I suggest we go completely original and have Mewtwo sized Legendaries for these three.
I like the eclipse idea.
Fire/Electric for the solar guardian Pokemon would be super special awesome! Only oven Rotom is Fire/Electric, so it'd allow us to have tons of creativity. Also, by making it Fire/Electric, it can be both strong and weak to the lunar guadian Pokemon, so it's kind of an equal playing field for them. I agree, they should be about six or seven feet tall like Mewtwo. Basketball playing legendaries! (/lame joke)
Gingerbread man: is fine as Normal/Ice
Panda: should be Normal/Grass.
Groundhog: Normal then evo is Normal/Ground. Not a bad idea.
Earthworn: As Yoshinichi says, he's thought of that but obviously Ground/Bug is nice and easy.
Nerve: Nerves are ELECTRICAL impulses. So an Electric type nerve family.
I agree, fused's ninjas are great. Plus his tiles are good too. Are they HGSS related?
I'm better at thinking designs up than spriting them... Here is a quick lineart of Bricklle, a Play on Brittle whilst incorporating Brick.
I'm thinking that there will be more grooves and indents on it and that it will look more rough and sandpaper like in texture.
Yeah, the grooves and cracks in Brickkle would be a good way to make it work as a Pokemon. I have an idea for how out would turn out.
The evil villains should have something to do with our general concept I think. Like how Magma and Aqua wanted to change Landmass or Make the seas bigger and how Galactic were all space/time like. I want two teams this time as well. They are directly opposed in their views, and have little fights and stuff. They're worse than in Ruby/Sapphire, where one team was on the side of the player. They're more like the situation in Emerald. Oh, and the leaders of the opposing teams are Brother and Sister. The teams are called Solaris and Lunaron.
And a third one. These guys are basically a group of 5 retired Policeman types/Soldiers who have Pokemon from different regions. I call them the ARC (Anti Radical Crime) Squad, or ARCS if you're including the Squad. They are trying to stop the evil teams from feuding and from one of them achieving their overall aim.
I like the idea of ARC. That could be the police force Looker is a part of! However, I agree with Kyle. We should base the evil team around something more lowkey and realistic. I don't really like the grandiose schemes too much. They're getting pretty cliche