The Master of Disguise

A film starring Dana Carvey as Pistachio Disguisey, a bumbling Italian American waiter working at his father's restaurant. He has a bad habit of mimicking people unintentionally. His mother and father are kidnapped one night, by mysterious bad guys. So along comes his Grandfather who reveals that the whole paternal family line are natural masters of disguise who utilise a mysterious transformative magic called 'Energico'. His father never told him because he didn't want his son to live a life full of dangerous enemies. But to get his father back he must train in the art of subterfuge, learn the Disguisey martial art (consisting of slaps and blocks to humiliate your opponent) and learn to use the tools of the trade, found in his father's secret lair (behind an incredibly elaborate bookshelf in the attic).

Oh, and he needs to hire a sidekick, who must be an attractive woman, preferably one with a nice, big bottom. So Pistachio's young friend Barney sends his unemployed mother, Jennifer Baker played by Jennifer Esposito, for an interview and she gets the job (despite her obvious handicap of a bottom measurement of only 34 inches). So Pistachio and Jennifer hunt down his father's old nemesis, Devlin Bowman (played by Brent Spiner), and his new collection of priceless artefacts. Along the way, Pistachio learns to see past Jennifer's tragic lack of bottom-fat and love her, and she learns to love him and his family's complete and total insanity.

There are three basic plot threads:

Pistachio, who should have been trained from pretty much birth, needs to become the Master of Disguise of the title.
Pistachio's father has been kidnapped by a rich ~~android~~ crimelord and only Pistachio can save him.
Pistachio is falling in love with his sidekick and she is falling in love with him.

Critics and audiences didn't like the movie very much, citing the extremely racist Italian-American stereotypes, the very crude toilet humor, sloppy editing, and the various instances of Special Effects Failure.

Tropes used in The Master of Disguise include:

Action Prologue - The movie begins with a backstory being narrated by Grandpa Disguisey, showing members of the Disguisey family in action throughout history.
Aerith and Bob - Pistachio is named after a nut, his sidekick's name is Jennifer. This is lampshaded by Jennifer who thought that her son was joking about his name.
Applied Phlebotinum - Energico is the magical Disguisey heritage that lets Pistachio apparently just grow studio-grade costumes, prosthetics and disguises.
Armor-Piercing Slap: The Disguisey Family style of Martial Arts.
Awesome McCoolname: Devlin Bowman.
Bullet Seed - As "Cherry Pie Man", Pistachio shot cherries at guys chasing him while infiltrating Bowman's secret underground lair. He even manages to do a headshot on one of them as he falls into the water.
The Bait - Jennifer is kidnapped by Devlin Bowman so that Pistachio will mount a rescue operation and walk right into a trap.
BBW - The Disguisey family have a thing for very big women, but more specifically women with huge bottoms. Father Disguisey is happily married to a rather large woman, and when Grandfather Disguisey points out what he considers a good-looking woman for Pistachio, an assessment that Pistachio clearly agrees with, it's someone even larger. There is also an implication that although Jennifer is still slim and small of bottom when she marries Pistachio, that she'll willingly gain weight for the man she loves after spending some quality time with Mama's deliciously fattening Italian food.
Big Damn Heroes - Jennifer is captured after spying on Devlin Bowman, so Pistachio swoops in at the nick of time, pretending to be a British Secret Agent who needs Jennifer's help. He talks Devlin into letting her go, rather than draw the attention of the British Secret Service to his lair. Later, Jennifer is kidnapped, but this time she was intended to serve as bait for Pistachio.
Conservation of Ninjitsu - Devlin Bowman usually has his two henchmen chase off Pistachio quite successfully, but when Jennifer is in danger, Pistachio fights off a large gang of ninja henchmen to save her.
Crazy Enough to Work - Pistachio tends to believe that many of the plans suggested to him fall into this category. They usually don't.
Creative Closing Credits
The Danza: Jennifer Esposito as Jennifer Baker.
The Dark Side - Energico has a Dark Side which Pistachio lampshades is just like Star Wars. It involves using your powers for self-gain or Becoming the Mask when imitating bad guys.
Gasshole - Devlin has a weird habit of interrupting his own Evil Laughs by farting. Kids like farts, right?
Grumpy Old Man: Grandfather Disguisey
Hot Mom - Jennifer Baker has a son from the very beginning, and she is played by Jennifer Esposito. Also played with in that Pistachio was, up until he met Jennifer, looking for a girl who looked "just like-a momma".
Housewife - Completely averted by Jennifer, a working single mother, and Momma, the head chef of an extremely successful, and extremely busy, Italian American restaurant.
I Have A Big Butt You Must Obey - Set during a climactic scene after the credits, Devlin Bowman summons a quartet of women with large posteriors to try seducing Pistachio over to the Darkside of Energico, to make him use his talents for booty (wealth) and booty (women).
Master of Disguise - The movie hints that the Disguisey family were behind pretty much every myth and legend of this sort of thing, forever. And of course, one of the three main plots revolves around Pistachio learning to become the Master of Disguise that the title mentions.
Never a Self-Made Woman - Brought up and averted. Jennifer is informed about the job opportunity by her son, but she still has to go through an interview that has apparently sent many very qualified, jaded applicants running from them in tears. She also has to overcome the 'handicap' of her small size and miniscule bottom.
Newspaper-Thin Disguise: Pistachio (as a "cow pie" man) somehow hides from Bowman's henchmen in this manner.
Screw Politeness, I'm a Senior!: Grandfather Disguisey no other, He does this to his grandson Pistachio, In most of the movie.
Shout-Out: Several; one to Chariots of Fire with the elder Disguisey stealing the Constitution, then to The Court Jester with the Secret Service agent's "Get it? Got it? Doubt it." And, of course, "Energico" which has a Light Side and a Dark Side and gives the main character's family their superhuman powers.
Slapstick: A.K.A. "Old Fashioned Humor", there's plenty of it.
Supervillain Lair - Devlin's "Secret Underground Lair! Full of Rare Artifacts!" is one of these. It is actually underground, being a sub-basement of his manor-house. However, it is not elaborate enough to count as an Elaborate Underground Base, being only a single, museum-style, trophy room with a stage and a camera set-up to sell the rare artifacts on a secret black-market auction online. Oh, and some ninjas in the ceiling.
Terrible Interviewees Montage - Averted. Instead of actually seeing the interviewees, we just see the grandfather yelling "Out!" at poor applicant after poor applicant.
Tropes for Dummies: The Master of Disguise for Dummies.
You're Insane!: Fabrizio (still disguised as Jessica Simpson) says this to Devlin.

Fabbrizio Disguisey: [removes disguise] Truly insane.
Devlin Bowman: Am I? [Evil Laugh] [Beat] Huh. [turns to speak, then farts]