Army of Two - 20p
Win 21 battles in a row in the Battle Tower with a partner
 
More Machine Than Man - 10p
Have a Pokémon with four TM moves
 
Swiss Army Knife - 10p
Have a Pokémon with four HM moves.
 
One Piece at a Time - 20p
Defeat a Pokémon after hitting it 15 times.
 
The Power of the Sun, In My Hands - 10p
Use Solarbeam when the sunlight is strong.
 
I Never Miss - 10p
Use Thunder when it is raining.
 
Whack-a-Mole - 10p
Use Earthquake while an enemy Pokémon is underground.
 
Decorated - 35p
Have one Pokémon have Hall of Fame Ribbons from Kanto, Johto, Sinnoh, and Hoenn regions.
 
Pokémon Party Ware - 15p
Beat three friends in a Pokéathlon competition.
 
Not Possible! - 100p
Beat any Pokémon with a Magikarp by using Splash until it runs out of PP, then using Struggle.
 
Papa Don't Make Small Scenes - 10p
Bring a Pokémon down to 1 HP, then use Hyper Beam to finish him off.
 
Boom. Headshot - 10p
Defeat a Pokémon with a one-hit KO.
 
This is the Definition of Rape - 10p
Make 30 eggs from the same Pokémon.
 
The New Pokémon Suck - 20p
Aside from your Starter, beat the game without catching any Pokémon beyond the original 151.
 
Yes, We Can - 20p
Beat the game without catching any Pokémon within the original 151.
 
Didn't You Hear We Have Healthcare Now? - 50p
Beat the game using the Pokémon Center to heal your Pokémon less than 15 times.

These are actually pretty good achievements in that you don't really get any of them by just beating the game once.

" These are actually pretty good achievements in that you don't really get any of them by just beating the game once. "

The New Pokémon Suck - 20p Aside from your Starter, beat the game without catching any Pokémon beyond the original 151.

" @Spiral_Stars said:

The New Pokémon Suck - 20p Aside from your Starter, beat the game without catching any Pokémon beyond the original 151.

an achievement for playing this game what i consider to be the only right way to play? sounds good to me "