>>35309973Aces are nowadays always from the gen they're introduced in. Which kind of sucks sometimes as half of the Kalos and Alola mons aren't that good. It's really noticeable with Siebold, who has a fairly mediocre Barbaracle as his ace, yet it's his Dragon Dance Gyarados that is the biggest threat by far. Clawitzer should have been the ace really, that coverage is pretty great.
Or how Molayne's ace was the extremely frail A-Dugtrio when he has Magnezone and Metagross which are much, much more dangerous.