If referring to the original series chronological order, episode 140 takes place during the Johto region.
In the overall series numbering used by many fans and databases, this is often the episode most associated with the "140" tag from recent years. Pokemon_Ep_140_ITA.mp4
Ash’s Poipole returns, now evolved into Naganadel , to assist in the battle. If referring to the original series chronological order,
Ash, Misty, and Brock encounter a wild Beartic that is unable to control its ice powers. now evolved into Naganadel
Ash’s Oshawott plays a significant role in helping the Beartic gain confidence.