Pokemon: The Indigo League
This was certainly one of the better seasons of Pokemon in hindsight, with a much quicker and more involving pace. This season was before the creators realised they could milk Pokemon for all it's worth (which is why season 2 goes around a never-used area in Pokemon games). Starts off well, with interesting episodes from Gym Battles to Ash catching stupendous amounts (the starters, Tauros army, Krabby, Pidgeotto, Caterpie, and that's not all) of Pokemon. Let down by a slightly lacklustre 8th Gym Battle. Thus is also the only season to tie into a movie, with the others having no relation to their movies. Plus this is when Team Rocket were evil and had good ideas, not the picked on crew they are now.
Brilliant news. Toonami UK have (finally) got around to showing Pokemon: Battle Frontier (Season 9). Starts Monday at 5pm.