What happened to Kintoki Sakata? In the beginning of the 3rd season of Gintama, 


  Gintoki was suspiciously missing and was replaced by a blonde haired version of himself named Kintoki. 


Later in the series it was explained why Kintoki was created and what had transpired after that which arrived to the point of the beginning of the 3rd season, but what happened to Kintoki after that? Does he just disappear or is there more information in the Gintama manga?
The Anime Gintama has a lot of side stories. Kintoki Skata is one of those characters in those side stories. The reason why the main focus was on him was because he looks like Gintoki and he also carries the same name except that his name starts with K not G. There is no more information about him yet in the manga. However, there is a possibility that he might return in the future releases of the mange. 

If you are interested in Kintoki, then you can read more about him in this wiki