As a series whose humor revolves around metafiction and intentional cliches, T3H Metroid Galaxy falls under a large number of "tropes," or reusable plot elements. They are listed here with links to TVTropes, an online tropes database.
- Action Girl (Samus)
- A God Am I (The Future Writer)
- Arch Enemy (The Future Writer to Samus and the other heroes)
- Back For The Finale (All three of them)
- Big Bad (The Future Writer)
- Black Cloak (The Future Writer)
- Breaking The Fourth Wall (Every issue with the Writer)
- Cardboard Prison (The prison Mother Brain locks the heroes in)
- Casual Danger Dialogue (Justified as it is a comedy series)
- Catch Phrase ("ZOMG!" and several others)
- Celebrity Paradox (Many characters)
- Cerebus Syndrome (Later seasons)
- Cerebus Retcon (Reincarnation and many other minor plot holes in early issues)
- The Chessmaster (The Future Writer)
- The Chosen One (Samus)
- Chronic Backstabbing Disorder (The Future Writer)
- Cliff Hanger (Many issues)
- The Climax (Issues 50, 100, and 150)
- Collapsing Lair (A Metroid staple)
- Comedic Hero (Everyone)
- Comic Trio (Samus, Oveur, and the Writer; Mother Brain, Kraid, and Ridley; Dracog, Pickett, and Bad Grammar Boy)
- Complete Monster (The Future Writer)
- Cosmic Retcon (Every time travel plotline)
- Credits Gag (Almost every issue)
- Crouching Moron Hidden Badass (Bad Grammar Boy)
- Cultural Cross Reference (So many times that each issue's page has a section devoted to listing them)
- Designated Antagonist (The Future Writer)
- Deus Ex Machina (So often there's an issue named after it)
- Dimension Lord (The Future Writer)
- Doomsday Device (The superweapon, the Doom Sphere)
- The Dragon (Ridley, literally; Dark Samus)
- Dramatic Pause (Many times)
- Dumbass Has A Point (Oveur, Bad Grammar Boy, several other characters)
- Enemy Civil War (Sykes)
- Evilly Affable (All the villains)
- Evil Overlord (The Future Writer)
- Evil Plan (Every volume)
- Evil Twin (The Future Writer)
- Exposition Party (Literally happens at Samus's birthday party in the anniversary special)
- Extraordinarily Empowered Girl (Samus)
- Faceless Goons (Space Pirates, Dragon Minions)
- Fetch Quest (At least once per volume)
- Flanderization (Oveur's stupidity)
- Flashback (Several issues)
- Flashback Twist (The Future Writer's involvement in Samus's past)
- Foreshadowing (Many times)
- The Freddy (Pickett)
- Friendly Enemy (Mother Brain, Ridley, Kraid, Dracog, Pickett, and Bad Grammar Boy)
- General Failure (Mother Brain, Dracog)
- Grand Finale (Three times)
- How We Got Here (The time travel issues)
- Internal Homage (The end of issues 50, 100, and 150)
- Ironic Echo Cut (Many times)
- Jerkass (Ridley)
- Just Between You And Me (The Future Writer, several times)
- Kill Em All (Issue 100)
- Knight Of Cerebus (The Future Writer)
- Love Triangle (Samus, Oveur, and the Writer)
- The Man Behind The Man (Cronal)
- Middle Management Mook (Ridley)
- Moriarty Effect (Every villain on the show)
- The Movie (Parodied in-universe)
- Mr. Exposition (The Writer)
- Musical Episode (The musical issue)
- Mysterious Past (Samus, the Writer and Future Writer)
- Mythology Gag (Several times)
- No Fourth Wall (The entire series)
- Odd Couple (Samus and Oveur)
- One Hit Kill (The Future Writer's lightning bolts)
- Orcus On His Throne (Dracog, literally)
- Padding (Some filler issues)
- Parody Episode (Many issues and whole seasons)
- Portal To The Past (The Writer randomly makes them)
- Posthumous Character (Samus's parents)
- Pseudo Crisis (Many issues)
- Punch Clock Villain (Ridley and Kraid)
- The Quest (Many seasons)
- Quirky Miniboss Squad (Mother Brain, Ridley, and Kraid; Dracog, Pickett, and Bad Grammar Boy)
- Random Events Plot (Earlier seasons)
- Recap Episode (The recap issue)
- Reincarnation (Almost every character)
- Sealed Evil In A Can (The Future Writer)
- Second Hand Storytelling (Some MacGuffins)
- Seinfeldian Conversation (Many times)
- Series Hiatus (Summer between each volume)
- Stable Time Loop (Oveur and the Writer in the past)
- Stick Figure Comic (The entire series)
- Straight Man (Samus)
- Three Amigos (Samus, Oveur, and the Writer)
- Thrown Down A Well (The Future Writer)
- Time Travel (Several plotlines)
- Un Canceled (Twice)
- Upgrade Artifact (Another Metroid staple)
- Villain Decay (Mother Brain, Ridley, Kraid, Dracog, Pickett)
- Villain Episode (Random Villain Issue)
- Villain Opening Scene (Several issues)
- Weapon of Mass Destruction (The superweapon, the Doom Sphere)
- Wham Episode (Many issues)
- What Cliffhanger (Several issues)
- Who Writes This Crap (The Writer)
- Word of God (This entire wiki)
- Xanatos Gambit (Collecting the relics)
- You Know I'm Black Right (Oveur's sexist jokes)