By completing the game (the final level being Zone 10-04), you will unlock two new, special zones for you to play. Zone 12 is special in that the speed in there is around 50% faster than usual, which makes matching Pokemon harder as you have to go much faster. Zone 13 will also be unlocked; it is a zone where the levels are endless and your main reason for being there is to get a high score. (Note, however, that Zone 13 still allows you to successfully Trozei Pokemon you've yet to Trozei.)