The battle against Missingno just kept getting better and more high-stakes as it went on. The final battle against it somehow reached Scott Pilgrim levels of awesome.
Slouch the Ursaring knocking out Gallade in the PMD universe with one blow.
Wings the Crobat proving his claim of having Super Strength by picking up KYOGRE and casually tossing it aside!
Chase the Pidove rescuing Artemis from a raging Scolipede, earning Artemis' respect and evolving into Tranquill shortly afterwards.
DS' gym match against both of the Opelucid Gym leaders, particularly the part where Goggles evolves into Krookodile during the fight and helps Chase take out Drayden's Haxorus.
In a flashback to when DS fought Team Galactic, a Galactic grunt won't let DS into the Veilstone Galactic Building so she can rescue Uxie, Mesprit and Azelf. When the guard refuses to battle her, DS tries threatening him with a hair dryer, which he just laughs off. What does DS do? She hits the Galactic grunt over the head with the hair dryer, knocking him out.
During the final battle against 'M, after Anom tricks 'M into absorbing him, 'M's anti-legendary shield is destroyed. This is followed by almost every single legendary Pokémon (including Arceus himself) showing up to take down 'M once and for all.
Ghetsis has brainwashed Kyurem, and DS and Wolf attempt to use the Grey orb to bring Kyurem to its senses. Ghetsis orders Kyurem to freeze everyone to death, and DS proceeds to move even closer to Kyurem, despite the fact that it is already charging up the attack and she could possibly freeze to death by standing so close to it if Kyurem didn't return to its senses. With Wolf's help, DS manages to bring Kyurem to its senses and save everyone.
Destroying the Pokémon Pinchers' Sky Fortress with the help of the legendaries.
The final battle between the Trainers and the Go-Rock Squad.