World                                          Password
1: Cemetery - Frankie and Heli                 --- 
              Grave Danger                     SVZFKHGP  
              Tomato Soup                      BXRFYHGP
              Disco Inferno                    ZVTCYHGP
              Spin-n-Puke (Boss level)         ---
2: New Toonland - Pow!                         KXVKRHKP
                  Twin Towers                  CVHCSHKP
                  Rock it!                     SVKLPHKP
                  Knock! Knock!                CVBLPHKP
                  The Flatulator (Boss level)  ---
3: Jungle Isle - Feeding Frenzy                RVTCSHGP
                 Congo Chaos                   XVVBRHKP
                 Jungle Gym (Boss level)       ---
4: Kung Fuville - Sumo City                    YTCHPHKP
                  Fish Bait                    ZTDHPHKP
                  Chop Chop                    DXVGRHKP
                  Toxic Turtle (Boss level)    ---
5: Rezopolis - Rez Knight Fever                GYVYRHKP
               On the Move                     ---
               Rez's Lair (Boss level)         ---
Bonus: Planet X - Saucer Section               PZYPRXYL
                  Free Fall                    ---
                  Bombs Away                   ---
                  Newton's 4th Law             ---
                  Head to Head                 ---
                  The Project                  ---
                  The Web                      ---
                  Clothesline                  ---

(Note: There are no passwords for Boss levels)

To select any level, enter PZYPRXYL as a password.