I have a bit of a list...
• Luvdisc / Alomamola. Pretty useless in battle, they both look similarly pathetic and they have pretty cruddy stats.
• Charizard. Massively overrated. Disagree? Stealth Rock. Your argument is invalid.
• Regigigas. Amazing stats, looks pretty epic but that ability sends all that down the crapper.
• Binacle and it's evolution - They look like E.T ate solid steel and then crapped it out.
• Lickilicky. Just... WHYYYYYYY?
• Flareon. Oh why oh why oh why... Dont you have any good moves.