Aipom -> B-? Yeah
Definitely. Life Orb Skill Link STAB Fury Swipes hits like several small trucks, but the best aspect of Aipom is its Speed tier. The fact that it gets such godly coverage as stuff like Knock Off, U-Turn, Gunk Shot, etc. kinda makes me wonder why it's so low (probs all the fighting nonsense but w/e). 16/17 in an attack stat is nothing to trifle with (see: Chinchou, Croagunk) and coupled with Life Orb, a great STAB, god-tier coverage and similar speed, Aipom fully deserves the move, and is on par with such things as Slowpoke and Floon (personally I'd put it in B with Scrafty and them but baby steps)
Karrablast -> C-? Yeah
Again, no questions. That No Guard is scary, man. Scarfablast is one of the hidden gems of LC imo.
In response to
Pancham, I totally agree on Elekid, but not Amaura.
Elekid -> Lower (probs C+ish)? Yeah
Imo the only thing keeping Kid so high is that god-tier speed. Its abilities are crap since the only sleeper is Foongus. While MixKid is dangerous, it suffers from the power drop that going mixed has. Its coverage is pretty iffy, Cross Chop is cool if you like missing and Fighting types are already everywhere, the elemental punches are pweak, and its special options are limited to electric attacks, signal beam, and HP. It also gets uber walled by the Pumpkin, which is becoming more and more of a problem. You could probably keep Kid in B- for being a sweet revenge killer (20 Speed is no joke) but he's leaning downward to me.
Amaura -> Lower? Nah
Amaura, I will grant you, is a bit of a mixed bag. That typing is literally worse than rush hour traffic with a minivan full of screaming children and Radio Disney. On the other hand, however, Amaura is great for a couple reasons. Amaura runs an excellent Scarf set, and the addition of Earth Power only sweetens the sugar bowl. Amaura can run 14 Speed without a speed boosting nature, which is cool cause then it reaches 17 in SpA. The real calling card for Amaura is those Refrigerate boosted attacks. Amaura has room to run Hyper Beam as an emergency out against fatmons along with Hyper Voice/Nature Power (HV hits through subs, NP can't be Sucker Punched). Amaura does have some significant flaws, it does need a bit of team support (just a fighting resist but pls who doesn't have one), but it is very, very good as a Scarf cleaner. Again, you could go either way on Amaura, but she leans up imo.