The semi-final battle gets under way, pitting Ash against Tobias. The talented Trainer is preceeded by his reputation--he's been defeating his opponents using only his Darkrai. Tobias comes on strong and quick, defeating Ash's Heracross, Torkoal and Gible one after another! But when Ash brings out Sceptile, a spirited skirmish begins, and for the first time during the Sinnoh League, Darkrai is defeated!
Tobias is unfazed by this turn of events. He next brings out Latios, another surprisingly powerful Pokemon. And with one move, Ash's Sceptile is unable to battle.
Ash follows up by bringing out Swellow and a sky battle between Swellow and Latios ensues. Latios proves too powerful for Swellow and Ash is left with one Pokemon, while Tobias still has five!
When Ash turns to Pikachu as his final Pokemon, the action-filled bout gets even more intense and eventually both Latios and Pikachu are rendered unable to battle at the same time. And since Pikachu is Ash's last Pokemon, Tobias is declared the winner! This is the first time Ash has made it to the final four of an event of this magnitude and he has gained the respect of Tobias--who then goes on to triumph in his final battle and is declared the winner of the Sinnoh League!
We leave our heroes as Barry bids them all farewell. Both Ash and Dawn vow to continue pursuing their dreams, while in the face of their determination, Brock finds himself questioning his own plans...
- There is no Professor Oak's lecture at the end of this episode. Instead, a minute-long preview for the Best Wishes series is shown.
- As of BW101 this episode marks the last appearance of Sceptile, Heracross, Torkoal, Swellow, and Gible.
- Another episode has a similar English title as this episode.
- This episode marks the only time Ash has flipped his hat in the Diamond & Pearl series during battle.
- This episode's English title is a reference to the phrase the final frontier.
- This is the only episode of Pokémon Diamond & Pearl: Sinnoh League Victors that kept the entire Japanese music unaltered, including the title card music.
- This currently is the farthest that Ash has ever gotten in a Pokémon League, reaching the Top 4.
- After Tobias defeated Ash, in the scoreboard a Mismagius silhouette appears in place of Swellow's one. Also, the Torkoal and Darkrai silhouettes are slightly different from before.
- After Ash told Pikachu to use Quick Attack the first time, he said for Pikachu to use Volt Tackle. When it hit Latios's Giga Impact, it was Quick Attack.