Which Pokemon is the "Best Looking" which one is the Worst looking?

[ZaP~]

Coolest Zapdos [My nickname comes from this pokemon...well really from the old pokemon card Rocket's Zapdos, that was my favourite at the time i played and after that mi nick was Zap] Sandslash or Jolteon are cool too

Worst looking...emm... one cat from the new generation, was so ugly i even didn't learn its name