Indigo Plateau=Season 1
Orange Islands=Season 2
Johto Journeys=Season 3
Johto League Champions=Season 4
Master Quest=Season 5
Advanced=Season 6
Advanced Challenge=Season 7
Advanced Battle=Season 8
Battle Frontier=Season 9
Diamond & Pearl=Season 10
Battle Dimension=Season 11
Galactic Battles=Season 12
Sinnoh League Victor=Season 13
Black and White=Season 14
Rival Destinies=Season 15
If you have a hard time remembering some here is a video
http://www.youtube.com/watch?v=oFHLjeWbSGc#
My personal favorite is Season 8: Advanced Battle
Made by AFatArmy