Oh, Exos? Yeah, you should... probably be glad that you haven't seen one, to be honest. At least a wild one. Anyway... [He coaxes the Shedinja to float up higher so that it appears on the screen again. It's still staring blankly, once again failing to give any sort of indication that it's even alive.]

Exos is a Shedinja which is... technically an evolution of Nincada but it has probably one of the weirdest evolution methods out there, to be honest. See, when Nincada evolves into Ninjask, sometimes the shell it leaves behind reanimates itself and you wind up with a Shedinja in addition to the Ninjask. See the little wing looking things? [He taps at the protrusions from Exos's back.] They aren't really wings, they're from where the Ninjask burst out of the back of its shell when it evolved.

While Ninjask is pure bug type, Shedinja picks up ghost typing by virtue of basically being a bug-zombie. It also gains an ability that is completely unique to its species called Wonder Guard. Basically, it makes Shedinja completely invulnerable to any attack that isn't its weakness. So if someone hit it with say...Solar Beam? Absolutely nothing would happen. But a fire type move as weak as Ember would knock it out in only one shot and something like Overheat would just be flat out overkill.