All the references in The Secret Biography of Donald Duck
- Donald compares ONE to a wizard from Della's favorite childhood movie
- The family goes on an adventure to find an immortal Maori warrior named 'Haka', who guards an ancient library in New Zealand.
- Some of the adventures Della mentions going on before Donald leaves for the navy are: finding the Kingdom of the Crystal Skull, finding One Eyed Willie's pirate horde, and finding Maui's magical Fish Hook.
- Mickey and Goofy mention having a ping pong match with a fellow sailor named Oswald.
- After a terrible storm blows into Duckburg, Scrooge is forced to cancel an adventure to Paradise Island where he was planning to find the Lasso of Truth.
- The Big Bad of the Navy arc is a pirate captain named Jack, who just so happens to be a sparrow.
- Donald is invited to join S.H.U.S.H by a dove named Agent Coulson.
- Donald learned to be a secret agent at a S.H.U.S.H. training facility disguised as a summer camp called Whispering Rock.
- According to Kay K, her last partner was a klutz named 'Agent Clouseau’ that bungled ‘the Pink Panther’ mission.
- One of the missions Donald and Kay K go on is to steal a ‘turn everything evil-inator’ from a mad scientist in Drusselstein.
- During their pursuit of a criminal in Italy, Donald and Kay wind up sending the suspect's car crashing into a cabbage stand; this causes the owner to shout 'NO! I MIEI CAVOLI!', which roughly translates to NO! MY CABBAGES!
- One of the agents Donald has to fight off while escaping S.H.U.S.H. headquarters is a platypus named Perry.
- Charles the helicopter pilot that helps Kay and Donald escape from F.O.W.L. is very reminiscent of another pilot named Charles.Charles: I’M THE BOLD ACTION MAN
- Right before Webby wakes him up to read the next part of Donald's journal, Huey was having a Junior Woodchuck dream about leading the organization to cast a magic ring into a volcano.
- Donald and Kay K's cover names while on the run are Sterling Archer and Lana Kane.
- When convincing Kay that disguising themselves as F.O.W.L. eggheads would be a good idea to infiltrate the base, Donald mentions a certain 'Agent 47' doing a similar thing in Sapienza
- Upon finding all of the captured S.H.U.S.H. agents in F.O.W.L.'s secret base, several rapid fire cameos are made including: Agent Samson, Agent Fury, and Agents Possible and Stoppable.
- Donald gets into a fight with a duck named named Daffy Duck after a piano duel gone wrong at the Ink and Paint Club before getting thrown out.
- A very subtle My Little Pony. reference is made when Donald says there's a parasprite infestation in the west wing of Mcduck manor.
- According to May, one of June's failed inventions was a Sonic Screwdriver.
- Some of May's favorite Mickey Mouse films include Fantasia and The Three Musketeers.
- Donald, Mickey, and Goofy catch up over drinks at The Snuggly Duckling.
- Before he leaves, Mickey mentions that he's staring in an upcoming film called Steamboat Willie.
- At the end of chapter 19, Donald "feels a sharp chill run up his spine, like some sort of disturbance echoed through the universe", because "he could have heard several voices cry out in shock and despair all at once" (it's the kids wailing at a brutal ciffhanger).
- After escaping from the Underworld, The Three Caballeros get in a fight with a Yakuza gang known as The Shie Hassaikai.
- Another subtle reference is when Donald mentions that he nearly got crushed by a jet engine that fell into his room when he tried to stay in bed all day.
- When reading through one of Felldrake's old journal entries, the dark sorcerer mentions releasing Pennywise in order to keep the Caballeros busy.
- During a conversation between Scrooge and Donald, the latter is trying to find Monkey Island so he can obtain Threepwood’s staff.
- At one point, during their training with Yen Sid; the group stumbled into a strange theme park world located in Yen Sid's study, with animatronic versions of Donald and Goofy.
- As a way of celebrating Donald's return, Scrooge decides to take him on a search for The Golden Helmet, that lets it's owner lay claim to all of North America.
- After surviving the rocket crash, Kay K washes up on Themyscira and was cared for by a wolf named Diana Prince.
- During another one of their adventures, Donald and Scrooge go to 'Nomura's keep' a castle built on top of Mount Vesuvius by a long dead samurai named Tetsuya Nomura.
- When Della drags her family on a long series of back-to-back adventures, Donald recalls wielding a magic hammer that shot lightning (that neither Scrooge or Della could lift) against frost giants and dark elves. as well as helping a small Oregon town fend off a triangle shaped demon.
- One of the missions Kay K pulled off as 'The Red Primrose' was stopping some maniac from setting off a nuclear bomb in the Siachen Glacier which would have contaminated a third of the world’s freshwater supply with radiation.
- After gaining an interest in comic books and manga, May's favorite series is about a green haired rabbit with super strength that goes to a superhero academy.
