I hate Gen 5 because most of the pokemon just copy previous generations.
Starters: Fire-Fighting is over used.
Patrat & Lillipup are Rattatas. Pidove is Pidgey, Roggenrola is Geodude, Woobat is Zubat, Audino is Chansey, Timburr is Machop, Tympole is Poliwag, Throh & Sawk = Hitmonchan & Hitmonlee, Sewaddle is a grass Caterpie but that's not so bad, Venipede is Weedle, Dwebble is Paras but Rock instead of Grass so it's excusable, Trubbish is Grimer, Foongus looks like a Pokeball which Voltorb did first but it's Grass/Poison which has been done to death since Gen 1, Klink is Magnemite but not Electric, Bouffalant is called Afro-Tauros any time I reference it, Alomomola is Luvdisc's evolved form.

So of the 154, that's 40 Pokemon (counting the different forms too) that are unoriginal feeling. 1/3rd of them! And this is BEFORE you take into affect what they look like.