History WebVideo / SgtFrogAbridged

** [[Franchise/MetalGear Solid Snake]] appears randomly, referencing the ''Metal Gear'' series under the guise of it being advice.

** While Solid Snake provides plenty of ''Franchise/MetalGear'' references on his own, the message left by HQ in the Post-Credits of Episode 10 is a ShoutOut to similar sequences at the end of ''VideoGame/MetalGearSolid'' credits.

* TheStinger: Every episode features two brief clips after the credits, one with visuals and one with only audio. They usually follow up a joke or situation earlier in the episode or fill up a plothole. They also serve as {{Sequel Hook}}s from Episode 10 onward, a'la ''Franchise/MetalGear''.

** Editor [=ThornBrain=] hides the covers of her favorite music albums in the background, usually 5 per episode. Several episodes were dedicated to specific artists including Music/{{Sparks}}, Music/TheyMightBeGiants, Music/{{Chrome}}, Music/TheBirthdayParty, Music/{{REM}}, Music/{{The Fall|Band}}, Music/{{The Damned|Band}}, Music/{{Pulp}} and Music/JarvisCocker, Music/PrimalScream, and Music/FaithNoMore and Music/MrBungle.

** Editor [=ThornBrain=] hides the covers of her favorite music albums in the background, usually 5 per episode. Several episodes were dedicated to specific artists including Music/{{Sparks}}, Music/TheyMightBeGiants, Music/{{Chrome}}, Music/TheBirthdayParty, Music/{{REM}}, Music/TheFall, Music/{{The Damned|Band}}, Music/{{Pulp}} and Music/JarvisCocker, Music/PrimalScream, and Music/FaithNoMore and Music/MrBungle.

** Keroro and Tamama. Often challenged, however, as Keroro [[AnythingThatMoves has openly]] [[HandsomeLech cheated on Tamama]], and despite [[spoiler:Tamama's pregnancy]], their relationship is on the rocks by the end of Season 2. They've mostly sorted out their issues by Season 3.

* SurpriseCreepy: While the series has had plenty of dark moments, they're usually [[BlackComedy played for laughs]]. In the first movie, [[spoiler:Dark Keroro suddenly remembers Keroro strangling him to death while they were toddlers]], and it's only [[{{Bathos}} half-funny]].

** In Episode 8, Tamama asks from where Kululu stole the anime backgrounds. When Kululu simply answers, "It was [[LightNovel/HaruhiSuzumiya Haruhi]]", the platoon is so disgusted that they lose all motivation to work on the project.

* TheyDo: Dororo and Giroro in the Post-Credits of Episode 15. Kululu acts as minister. HilarityEnsues.

** Giroro's poem at the end of Episode 15 quotes a WebAnimation/YouTubePoop by team member Vorhias.

** "'''[[https://www.youtube.com/watch?v=9r-V_wHf6TU Friendship]]'''" - Parody of "You've Got a Friend in Me" by Music/RandyNewman from ''WesternAnimation/ToyStory''. Written and sung by Travis to parody Newman's guttural singing voice by having the entire song be lyrically nonsensical and garbled. AKA: "Don't Hit Your Dick with a Brick".

** Editor [=ThornBrain=] hides the covers of her favorite music albums in the background, usually 5 per episode. Several episodes were dedicated to specific artists including Music/{{Sparks}}, Music/TheyMightBeGiants, Music/{{Chrome}}, Music/TheBirthdayParty, Music/{{REM}}, Music/TheFall, Music/TheDamned, Music/{{Pulp}} and Music/JarvisCocker, Music/PrimalScream, and Music/FaithNoMore and Music/MrBungle.

*** Shurara laughing manically and then shouting "Stop laughing!!!" is a reference to the ending of "These Hands" by Music/TheDamned.

** Garuru, [[UpToEleven who's so warm-hearted and supportive of his brother Giroro that it drives Giroro insane]], and he believes everything Keroro does is genius. He's also out to defeat the Keroro Platoon and finish the invasion of Earth, regardless of who gets in his way, at one point shooting Giroro in the back.

* CloudCuckoolander: Every character is "off" to some extent. Fuyuki, Tamama and Aki straddle the line between this and TheDitz, Dororo straddles the line between this and serious mental illness, and Joriri takes it UpToEleven to incomprehensibility. Even the {{Straight Man}}/{{Only Sane Man}} characters of Giroro and Natsumi have their weird moments.

* {{Flanderization}}: This series initially [[UpToEleven out-flanderized the anime]], but the creators decided after Season 1 to [[DefiedTrope defy this trope]] and develop their characters further and not to reduce them to single jokes.

** Dororo/Zeroro, UpToEleven from the original into lethal territory with Keroro's and Giroro's games such as "[[BlackComedy Zeroro Dies]]".

** Giroro's crush on Natsumi was a recurring joke and important part of his character through Season 1, and its last appearance was as a focal point in the first segment of Episode 10. Giroro turned his affections toward [[YaoiGuys Dororo]] almost immediately after in Season 2, though this was foreshadowed a few times. The sudden drop gets addressed in Episode 18: the emotional stress of courting Natsumi with no success made Giroro lose interest, and Dororo happened to be in the right place at the right time.

** As of Episode 18, [[SchoolgirlLesbians Natsumi and Koyuki]].

* SchoolgirlLesbians: Though the original series features at least three distinct girls with a crush on Natsumi, ''SFA'' has every girl in her school obsessed with her, including the teachers. Natsumi and Koyuki become this officially at the end of Season 2.

** In the first movie, Giroro is shocked to see Doruru and says "Father?! ''({{Beat}})'' Oh, no it's not- thank god," a [[DefiedTrope defiance]] of the series' tendency to make various characters related.