Mawile looks, have the description, and learns the moves of the archetypal dark type...instead both types she has seem to be put there just because at the time, there were too few steel (back then in gen 3) and now fairy types.
Garchomp. I know it's a land shark, but it just doesn't look like a ground type.
Palkia. I fail to see the water part of it.
Yveltal's Oblivion Wing seems like a weird choice, but i guess they wanted to get a neutral attack vs Xerneas, or just didn't want to give it ridiculous power when combined with Dark Aura and/or Big root.
Magnemite without levitate is also weird, but these are types, not abilities. Or moves, but whatever. --- Because time control. What matters are the results.