Crustle, it's an amazing Pokemon with great design and decent potential in battle thanks to Shell Smash but people like to dismiss it as a Gen 5 copy/version of Kingler and they don't see how unique and amazing Crustle actually is.
+1 on Eiscue, I really like it for whatever reason. I also like one of the most hated Pokemon in Unova being Vanilluxe, and I'm not sure how this Pokemon fares but I reaaaally like Oricorio too (specifically the Baile form)
The two thirds of the Simi trio . I always use them whenever I go back. Fairly cool design concept and I like how they pulled it off.
The disliked one is simipour because it killed my starter in a nuzlocke.