Moving Pokemon in Pokedex:

Select basic Pokemon, then Press Start to watch an unevolved Pokemon move in the Pokedex.
*Note: This trick only works when the game is played in a Game Boy Color system.

Pokedex Record:

Enter the Pokedex and press Select to view how many Pokemon have been obtained and seen.
*Note: The ones you have seen in your Pokedex are shadows.

Get Infinity Doubles:

Beat one of the gyms. Then go to where you first started. Go on the PC. Click on e-mail. If you see it flashing click on it. It will give you cards. Then go to another place. Come back and it will be flashing again and blammo; infinity doubles.