Thunder Bro.

And here Thunder Bro,for my card game and both brother complement each other of course.

Now I gonna leave a few things clear, this don't have nothing to do with those three pokemon so there's no a earth brother that just a made up thing, there's something similar but its a Godness who it's not even a sister of these two or have a direct relation and either appear with them in those old scrolls,statues,ect.

Fujin and Raijin google them,pokemon never made up things from 0 they are always based on animal or lore.