Awesome / DuckTales the Movie: Treasure of the Lost Lamp
Scrooge fighting off the scorpion monsters with nothing but his bare hands and a cane. At one point Webby even helps out!
The sheer fact Scrooge was willing to stay and take on Merlock, despite now knowing the extent of his powers. "No! We stand our ground!"
The first time Genie actually tries to warn him about Merlock coming after him fails miserably. The moment Scrooge recognises him in the crowd he makes a beeline for him.
Scrooge takes exactly zero of Merlock's crap the entire movie. Even when Merlock uses the lamp to destroy the money bin and create his nightmarish fortress, Scrooge stands up to him. "Return the bin before I stuff that lamp down your throat!"
The Genie coming up with a way to save him and Scrooge from Merlock when Scrooge stubbornly refuses to wish them to safety.
The infiltration of the Money Bin.
Scrooge's free-falling Final Battle with Merlock over the lamp. Bear in mind Merlock had shape-shifted into a griffin and Scrooge is freaking ninety (though he's survived so much one doubts terminal velocity would kill him). The old duck just whips out his cane, knocks away Merlock's shape-shifting talisman, and lets him plummet to his doom.