The stupid thing about Archeops is that they didn't need to overcompensate. Haxorus and Chandelure are stonger and bulkier, plus Arceheops is frail enough that it's going to die to one or two hits anyway. They're called "Glass Cannons" for a reason.
To keep this on topic, Piplup and evolutions not getting Roost. The Japanese name is something along the lines of "Feather Rest" and they definitely have feathers because they're penguins, yet shit like Salamence, Dragonite, and freaking Tropius can be taught the move when they clearly don't have feathers.
Yveltal being the only Pokemon to naturally learn Focus Blast. I guess you could argue that it's using life energy or something (it's called "Fighting Spirit Bullet" in Japan and is clearly an energy/ki attack), but it's still weird.
Latias can get Sucker Punch via tutors in HGSS, while Latios can't. What???