In addition to this, the Royal Unova leaves each day at varying times. In previous games, the times that the different parts of the day was static, but here, like in real life, the seasons affect what time each part of the day is. The final effect is the change in the way the time of day works. Such as in Winter, you'll hear more bells in most areas and Undella Town's music is more upbeat during Summer. In addition to that, the background music will change in a variety of areas to reflect the season. In addition to this, in Route 20 during Autumn, various leaves will fall, giving access to many new items and Castelia Sewers empties of water in Autumn and Winter This only occurs in Winter and in the areas of Icirrus City, Route 8, Moor of Icirrus, the Twist Mountain and Dragonspiral Tower. An example of this is just above Icirrus City where, in Winter, a snowfall allows you access to a cliffside previously unaccessible. Secondly, several areas will have new areas accessible within certain seasons. This only occurs in Route 6, Route 7, Route 8, Route 20, Twist Mountain, Icirrus City, Moor of Icirrus, Dragonspiral Tower and Undella Bay For example, some Pokémon will be common in the Summer, but rare in the Winter or even exclusive to a specific season. First, the wild Pokémon in each area will vary significantly from season to season.
In addition to that, there are a few core changes. Normally, it may rain in one area, but it'll snow in that area in the Winter. In addition to that, the weather will sometimes change. Each season has a slightly different look, depending on what part of Unova you're in. The Seasons have several effects upon the game. This means that you will have 3 opportunities to access each season in each year. This cycle allows for all four seasons to be done within four months, following which, the cycle gets repeated. Unlike the day/night cycle however, the seasonal cycle is not completely based upon and dependant on the real world seasonal cycle.