Countless charred remains mar the landscape of places through which Thundurus has passed.
– Pokemon Black Pokedex
I’m not sure what Therian forme Thundurus is supposed to be. I read it’s supposed to be a snake/lizard/reptilian creature, but it just looks strange to me. Also not sure where the Electric reference comes in. It’s probably my least fave of the Therian formes. It looks rather top-heavy as well. Colour-wise though, it’s alright, much better than the purple-green of Tornadus.
Stat-wise, it has the same base stat total as the Incarnate forme; it sacrifices Attack and Speed for Sp Attack, which is beneficial to it since it can learn some good Special moves like Thunder and Dark Pulse, as well as Nasty Plot.