Top Row (Left to Right):
Golbat- The infamous WTF?!?! Possibly the worst sprite?
Dragonite- Doesn't look quite majestic in my opinion. A little chunky if you ask me
Moltres- Up there on the top worst. Fire bird=Fire
dud
Executor- Quite intimidating and ugly !
Geodude- Thumbs down man! Those little pebbles on it's head are extremely odd
Ekans- That is not an Ekans. That is a common garden snake with bad pixel diarrhea.
Fearow- I didn't know what this was until I saw it evolved from Spearow. Wow =|
Blastoise- Now
he should be the heaviest Pokemon. He looks like he ate his 2 pre-evolutions
Ivysaur- Simply doesn't look like a flower, or tree, or anything grassy really.
Bottom Row (left to right):
Pigeot- Looks like an angry crow that didn't get a meal. Needs a haircut too!
Poliwrath- "I don't want a backhand from you!" Looks like my father... xD
Tentacruel- Someone's a little angry. Guess he didn't get lucky =P
Machop- Quite possibly the scroniest looking Pokemon (and it's supposed to be strong)!
Gastly- Like said, I can make this in paint with a Spraypaint.
Kabuto- The worst looking sprite in my opinion. It looks like a ugly flat penny or something. And those little claws by far are the most terrifying appendages I've ever seen. That will make you bleed until..wait it won't.
My opinion :D