Last hint! No more hints now (otherwise you would get 0 points according to the formula in the first post)
And use all the hints I gave.
Current wrong guesses:
1. It has something to do with the anime.
2. It has something to do with characters of the day.
3. It has something to do with the different regions Ash travelled to.
4. It only matters in which episodes they appear and not what they do in the episode.
5. Have a look at that list: http://bulbapedia.bulbagarden.net/wi...ers_of_the_day