I hate Lucario and Greninja and I don't understand the hype/love for them. They're both terrible designs, they're both nothing special and yet they both receive an insane amount of unwarranted fan service. Lucario got its own movie for some reason despite not being legendary, and Greninja got some weird anime-reference in-game version.
Gen 5 is the worst of the lot. There are some awful designs, a lot of the names are bad, and the compressed pixelated look of the sprites in battle is amateurish and laughable.
Gen 5 Hate List
Pokémon that are just clones of Gen 1 Pokémon
- Munna/Musharna = Drozee/Hypno
- Roggenrola/Boldore/Gigalith = Geodude/Graveler/Golem
- Woobat/Swoobat = Zubat/Golbat
Drilbur/Excadrill = Diglett/Dugtrio
- Audino = Chansey
- Timburr/Gurdurr/Conkeldurr = Machop/Machoke/Machamp
- Tympole/Palpitoad/Seismitoad = Poliwag/Poliwhirl/Poliwrath
- Throh/Sawk = Hitmonlee/Hitmonchan
- Trubbish/Garbodor = Koffing/Weezing/Grimer/Muk
Foongus/Amoonguss = Voltorb/Electrode
Klink/Klang/Klinklang = Magnemite/Magneton/Magnezone
Bouffalant = Tauros
Pokémon with awful names
Tranquill (Just the word tranquil)
Unfezant (There's no good way to say this one)
Zebstrika (Or this one. Also, it's actually a cool looking design but it's ruined by the crap name. They do this a lot in Gen 5)
Conkeldurr
Throh
Sawk
Krookodile (Just the word crocodile)
Duosion
Reuniclus (????)
Amoonguss (I get the joke, it's just not funny and doesn't work as a name)
Eelektrik (Just the word electric)
Beartic (No good way to say this one, just sounds stupid to say. Another example of a cool Pokémon ruined by a crap name)
Heatmor (Sounds like a cooking instruction)
Deino (Is it pronounced Die-no or Dee-no? Either way it sucks)
Pokémon with apocalyptically bad designs
Pignite and Emboar (They can't resist making things bipedal!)
Timburr, Gurdurr and Conkeldurr
Throh and Sawk (They're wearing clothes, man!)
Trubbish and Garbodor
Gothita, Gothorita and Gothitelle (INFINITY VOMITING EMOJIS)
Solosis, Duosion and Reuniclus (.....wtf)
Mienfoo and Mienshao (Creepy)
Tornadus, Thundurus, Landorus (Weird muscle-bound strongmen with tails. That can fly)
And that about it covers it.