Like most of the previous Mainstream Pokemon Games, there are a number of events that will occur daily within this game as well. This means that each and every day, a player can activate these specific events. Most of these Daily Events revolve around battling specific characters in rematches, but there are a few that pertain to obtaining Items or some other aspect of the game. Below is a list of all the Daily Events one can access within the game:
Pewter Crunchies
Within the Pewter City Pokemon Center, you will find a man who will sell your trainer Pewter Crunchies for $500 each and every day. Believe it or not, this is one of the few known ways to obtain this rare item.
Madame Celadon
Within the Celadon City PokeMart is Madam Celadon, a character that will allow you to personally set the natures of all Wild Pokemon for a day. She will charge you $10,000 in order to do this, and you can do it each and every day since the Natures of Wild Pokemon will reset back to random exactly twenty-four hours after doing this. If you're looking to obtain a Pokemon with a certain nature, especially when hunting for Legendary Pokemon, Madame Celadon is the character you must see.
Hidden Cave Items
Every single day, the hidden Items found within the caves across the Kanto Region will reset. This allows trainers to head back to said areas in order for their Starter Partner Pokemon to find these special items. These items include Evolutions Stones and Fossils.
Slowpoke Sitting
Near the Pewter City Museum, you will find a woman with her Slowpoke. On a daily basis, she will ask you to watch her Slowpoke for her while she goes and runs an errand of sorts. Even though there isn't much to babysitting the Slowpoke, she will still reward you with a Big Pearl for your troubles.
Free Nuggets From Diglett
After your Starter Partner Pokemon has learned the Strong Push Secret Technique, you can find a Diglett hidden within the wall of the Safari Zone Warden's House in Fuchsia City by moving the boulder inside of the home. By visiting this Diglett daily, it will give you a Nugget that can be sold to PokeMarts for loads of cash.
Pokemon Trainer Mina Rematch
After obtaining the Chop Down Secret Technique on the S.S. Anne and then departing the ship, you will meet a Pokemon Trainer that goes by the name Mina. She is a Trial Captain from the Alola Region that is presently visiting the Kanto Region, and she will actually challenge you to a battle the first time you meet. After defeating her, you can rematch Mina on a daily basis. She will give you a Bottle Cap each time you win against her in battle, with her team improving after you have defeated the Elite Four.
Gym Leader Rematches
After defeating the Elite Four and becoming the newest Kanto Region Champion, you can rematch each and every Gym Leader back in their Pokemon Gyms (including the newest Viridian Gym Leader, Blue) on a daily basis. All of their Pokemon Teams will be much stronger this time around.
Master Trainer Rematches
After defeating the Master Trainers included in the Post Game Master Trainer Challenge, you will actually be able to battle them on a daily basis. The same rules will apply when you do rematch them, however, with your trainer only being able to use the same Pokemon they are a Master at using.