Let me tell waht I think:
Pikablu: He is very good, although he is quite different from Pichu / Pikachu / Raichu. I think he should have an yellow tone somewhere. And the tail resembles too much a fish. I suggest you to use a turtle tail.
Abnorm'L: The name doesn't say anything about the Pokémon (unless it has a word that I don't know). Since all Pokémon has name that has connection with them, I think you should do that. Also, it looks too much like Farfetch'd. I think you should recolor it, so it seems that his feathers are still going to change (like real baby birds).
Acconr Pokémon: Bad, the only one that is bad in fact. It looks too much like a Digimon. It needs too be almost compltely redone. The idea is good, it is just that the picture doesn't look like a Pokémon, like Yami Ryu said.
Overall: You have great ideas and you're quite good at spriting. Just think more on the other pokémon and how they look like.