You can advance the system date to get more Pokemon easily. Start the game, leave, and save the game. Advance one day in the system settings, and enter the game again. You will get another Pokemon. You can set the clock back to the correct value afterwards. Although you will get a message about your game data being corrupted, you will still retain the new Pokemon. However, you will have to wait two days for your next "new" Pokemon, but the daily new Pokemon will appear after that on schedule.