"Characters speaking English" At several points you can tell what characters are saying, Lumpy is the best example of this "Cro-Marmot is dead" He's in a block of ice, he probably is "OCs" The creators held competitions to put fan-characters in the show "Debatable deaths" Deaths not shown on-screen or things that are potentially survivable, for example, Cub could've lived in Doggone It! "Pop is a bad father" What it says on the tin "The Ants" in Tongue and Cheek the Ants' kill on Sniffles was so utterly horrifying the creators went easy on Sniffles after that, the Ants haven't appeared since "Cursed Idol" The Idol from Idol Curiosity can be seen in a lot of episodes, it's implied to be the cause of why everyone's dying "Cro-Marmot is supernatural" He moves around in an ice block "Banjo Frenzy" The pilot episode, featuring beta versions of Lumpy, Giggles, Cuddles, and Toothy "Truffles" The character who lost Vote or Die, appears in the background a lot as a cameo "TV Show" HTF aired on Netflix for a while "Realistic deaths" Several plots and deaths in the show are based on real life events "Made With Flash" What it says on the tin "Mondo Media" Simply knowing who makes the show
![flippy happy tree friends flippy happy tree friends](http://pm1.narvii.com/7125/e808ecd2b62349fb6f03e83b154df27b3c347545r1-1366-2048v2_uhq.jpg)
"Flippy/Fliqpy" Merely the fact that Fliqpy has a different name
![flippy happy tree friends flippy happy tree friends](https://vignette.wikia.nocookie.net/happytreefriends/images/d/dc/Flippy.png)
![flippy happy tree friends flippy happy tree friends](https://ih0.redbubble.net/image.70957032.7477/raf,750x1000,075,t,e0e1dd:064437a66d.jpg)
"Youtube Copyright School" Youtube partnered with Mondo to explain copyright and subscriptions, Mondo used HTF characters to do this I can't explain all of them but I can explain most: