When Scrooge first engages the Moonlanders in battle, he uses his cane in the same fashion as the DuckTales NES video games (and the remake DuckTales: Remastered (2013)) of using it as a pogo stick, and as a golf club.
As the watermelon of Mickey Mouse's head gets tossed into the sea, Donald says to it "See you Real Soon", which is the closing line of each episode in The Mickey Mouse Club (1955).
The state Donald ends up in from the time he spent on a deserted island resembles that of Chuck Noland from the film Cast Away (2000), and him making Mickey's head out of a watermelon alludes to Wilson the volleyball from that film.
When Scrooge poses as Darkwing Duck, this pays tribute to the episode The Masked Mallard (1989) of the original DuckTales (1987) when Scrooge took on the identity of the titular superhero, a name of which would later become one of Darkwing's Superhero Sobriquets in Darkwing Duck (1991).
Upon finding Donald with Mickey Mouse's head made out of a melon on an island, Donald tells them in Mickey's voice "Hot dog, we got company". This is a reference to Mickey's very first lines from The Karnival Kid (1929).