Heatmor
Design could have been so much better. Stats are a total letdown.
Cryogonal, Beartic, and Vanilluxe
This could have been the new beast ice types, but not so...
Klinklang
Ok design, horrible movepool. C'mon Nintendo, just give us a good, pure steel type for once.
Druddigon
The design hurts my eyes
Gigalith
Awesome design, awesome attack and defense, horrid movepool and speed.
Zebstrika
I was originally going to use this on my team, but it's stats just don't stack up against the better electric types. I love the design though.
This list is pretty incomplete, but I have stuff to go do
Also keep in mind that this list does not include Pokemon I knew would suck from the start. These are only the disappointing ones. The ones I was looking forward to using before I played the game.