Bleach is notorious for having a large amount of "filler"—episodes created for the anime to allow the manga time to get ahead. These are not part of the original story. While some are decent, many disrupt the pacing.
(152–167) 152. The Awakening of the King 153. The Dark Side of the Moon 154. The God of the Flash 155. The Terror of the Unknown 156. The Unforgettable 157. The Power of the Shinigami 158. The Decision of the Heart 159. The End of the Nightmare 160. The Slumbering God 161. The Returning Hollow 162. The End of the Duel 163. The Final Sword 164. The Reunion of the Shinigami 165. The 10th Division’s Struggle 166. The Beginning of the End 167. The Final Chapter Begins bleach episodes
(266–316, but skip 287–288, 290–294, 296–299, 301–304, 306–310, 312–315 – actual filler episodes: 266, 267, 269, 270, 271, 273, 274, 275, 277, 278, 279, 281, 282, 283, 285, 286, 289, 295, 300, 305, 311, 316 – but to simplify, the arc runs 266–316 with many recaps. Better to list main canon again after 265.) Bleach is notorious for having a large amount
The core story of Bleach is driven by the manga canon. If you want to skip the filler (non-canon) episodes, these are the essential arcs and their episode ranges. (152–167) 152
Ichigo vs. Grimmjow (The ultimate physical brawl).
A massive saga involving the betrayal of Sosuke Aizen, the introduction of the Espada, and Ichigo's "Hollowfication" training. This section contains several sub-arcs, including the Hueco Mundo and Fake Karakura Town battles.