>>21819131Quoted here.
Let-me explain:
Near/at the end of Johto Arc, have a EP about a "birthday party" of Pikachu, celebrating the day 1 year after Ash picked Pikachu from Oak.
So, Cannoic, Ash started with 10, and after Johto celebrate 1 year of adventure with a surprise party to Pikachu.
So, Ash has confirmed cannoic 11 after Johto.
Considering that every ep has at least one day, its supossed to Ash pass at least one year at the end of DP gen. With a unconfirmed 12-13 years old after he left Dawn to Iris.
After that is bulshit, and ash back to 10 years old, with a weird past about Serena.
Ash supossed to never see a real pokemon before oak, but in this way he just know more about pkm that in gen1 