[quote=@Shiny Keldeo]
[@Dynamo Frokane] About your post, you need an official Pokedex given to you by a Professor to challenge Gyms in most if not all regions. That's been set in stone in the Anime I'm pretty sure. I could accept that the Pokedex Model you put in your post was the one you were given, but one would have expected you to have at least the Sinnoh Dex since you came from Sinnoh and such.
[/quote]

Im pretty sure that a pokedex was only for collecting, I did't know it was part of pokemon league rules. Just going by the first season, Oak gives the two protagonists a pokedex because he tasks the kids with discovering every pokemon. All the supporting cast are all trainers without pokedexs. (Brock, Max, Tracy) etc.

Just looking at the bulba entry it doesnt say anything about pokedex being part of pokemon leauge rules. A pokedex is just one of many ways to identify yourself as a trainer.

[url=http://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9dex#In_the_anime]This is from the anime section.[/url]