I'm not basing these off of power/efficiency in battle, because my favorites consist mostly of Pokemon I think look "cool".
Some of them animate if you hover your mouse over them(:
**NOTE**
Some of the sprites didn't work and this took way too long not to post, so sorry if some of them don't appear.
Normal
Fire
Water
Electric
Grass
Ice
Fighting
Poison
Ground
Flying
Psychic
Bug
Rock
Ghost
Dragon
Dark
Steel
I definitely prefer Google Chrome for its speed and sleek look, but if I had to use another I'd either choose Firefox or Internet Explorer. I've never tried Opera and I can't stand Safari.
My first shiny was a Voltorb on Emerald. This was before I knew anything about shinies and I seriously thought it was a glitch in the game... Noobprobz.