Or Hardcore (no savestates but fast forward is permitted) which plays like if you were playing on console as intended. There is also a FAQ on the site if you have any other questions as well as a forum.

Most people use retroarch, there will be an option in a tab on each emulator that says achievements. You will then have to login to RA using the same credentials, then after you are in, you will see a bunch options in the achievements menu. You can play a game as either softcore (allows savestates)

Go to retroachievements.org and make an account. Then download an emulator with achievement support in the download section. Search a game you want to play and go to the supported files section tab to see which version to use.

Oh boy! I love playing Pokémon on the PS2!

Congrats on another revolution around the Sun! \(^w^)/