A prerequisite to unlock the four seasons is to survive 15 minutes with Miang Moonspell to unlock Menya Moonspell. Once you've done that you can start the game with your new character. To Evolve "Four seasons" you must have a level 5 "candelabrador" a level 5 "spinach" and finally Level 8 "Four Seasons". Opening a chest after the 10 minute mark should evolve this combo. You can also acquire this from getting candy box II from a chest.