Work in Progress
Season 1[]
- Whose Line Is It Anyway? - The swordfish and the pufferfish eventually die from a loss of oxygen.
- Tongue Twister Trouble - Sniffles is pulled into the water by an anvil and gets encased in ice, causing him to freeze to death or be put into suspended animation. (Cro-Marmot can survive in an ice block similar to the one Sniffles is in)
- Off the Hook - The Electric Eel gets scrapped in the coral reef. (We don't see it exactly happening - the eel might've just also hidden in the reef.)
Season 2[]
- Class Act - When the school explodes, it kills everyone. (Debatable for The Cursed Idol as it could have just been launched into the sky. The deaths of Fliqpy, Cro-Marmot, and Splendid were confirmed by Warren Graff.)
- Shard at Work - A goldfish may have died after living in Handy's mouth filled with blood. (Death not seen)
- Remains to be Seen - Every possible kind of living thing (including zombie Nutty) was killed when Fliqpy’s brain exploded. (Deaths not seen)
- Remains to be Seen - The Cursed Idol may have died when Fliqpy's brain exploded.
- Stealing the Spotlight - Petunia, Sniffles, Flaky, and everyone else are disintegrated by the heat of Lumpy's lights. (Deaths not seen)
- Ski Ya, Wouldn't Wanna Be Ya! - Petunia and Giggles are killed by the avalanche Flaky caused. (Neither are seen and being four days later, they might have gone home)
- From A to Zoo - Flaky, Lumpy, and the baboon may have died after their bus crashed. If they survived the crash, it is possible that the baboon killed them afterward. (Death not shown)
Season 3[]
- A Sucker for Love Part 2 - In Nutty's imagination, it is implied that he murders Lumpy as an act of revenge for his affair with Nutty's "wife". (The act is not seen.)
- Peas in a Pod - A Pod Lumpy may have died after catching on fire.
- Wrath of Con - Cro-Marmot and possibly a lot of Generic Tree Friends are blown up by the exploding building.
- Wrath of Con - Truffles may have died when the building collapsed.
- See You Later, Elevator - Multiple Generic Tree Friends possibly die from the explosion. (Deaths not seen)
- The Chokes on You - At the end, Flaky possibly dies after choking on a donut made of Lumpy's swollen hand.
- Breaking Wind - Every possible kind of living thing was killed because of the fart made by Splendid or when Petunia lit the world on fire with a match. (Except for Petunia and deaths not seen, as most of the possible deaths were off-screen, and a few characters could have taken shelter, and many of them are currently unconfirmed.)
- All In Vein - Mr. Pickels was bitten by Lumpy. (Off-screen, Mr. Pickels might just be an inanimate object)
Season 4[]
No Debatable Deaths!
Season 5[]
- Just Be Claus - The Reindeer may have fallen to its death after colliding into Splendid.
- Just Be Claus - Petunia may have burnt to death when some burning coals ignite (Off-screen, she easily could've jumped in the snow at any time to put the fire out).
TV Season[]
- From Hero to Eternity - Giggles may have died after half of her head got burnt by lava and falling off a cliff. (The snow could've put the fire out)
- Doggone It - Cub may have died from being attacked by Whistle. (He suffered similar injuries in And the Kitchen Sink and survived; it is possible that Pop took him to a hospital before Whistle did any fatal damage. For more information, see Cub's Death.)
- Concrete Solution - Cuddles is the one driving the red car that Sniffles crashes into. He may have died after being hit, or when the bridge cuts in half. (Death not shown)
- Concrete Solution - Flaky, Russell and Cro-Marmot die when their vehicles fall off the bridge. (Death not shown)
- Dunce Upon a Time - The beanstalk growing inside the cow would've crushed her organs. (Death not seen)
- Gems the Breaks - Giggles and Petunia were swept away by a huge wave of Splendid's vomit. Perhaps they may have died.
- A Change of Heart - Lumpy possibly dies from a heart attack.
- A Hole Lotta Love - Cub dies when he falls down the well at the end of the episode. (He could've survived)
- Mime to Five - Sniffles drowns in the ocean.
- Mime to Five - Lumpy's Elephant may have been possibly eaten alive by Lumpy's Killer Ducks.
- Blast From the Past - Prehistoric Sniffles presumably died since his scene is thousands of years before the rest of the episode. (He may have been frozen in ice like Cro-Marmot) (Permanent)
- See What Develops - Splendid kills some Generic Tree Friends if they were in the building he crashed into after The Mole temporarily blinded him with camera flashes.
- Aw, Shucks! - The Crow might have died if the kernel it had in the beak was popping afterwards.
- Wipe Out! - The sharks most likely die when the ocean freezes. (Depending on how much of the ocean ended up freezing and whether or not the ocean was frozen completely or just from the surface)
- Tongue in Cheek - The aphid seen in the episode might have died when Sniffles' robot made the anthill explode.
- I've Got You Under My Skin - Many more germs may have died when Lumpy explodes, due to the germs losing their host. (It is possible it can survive that)
Shorts[]
- Banjo Frenzy - The beaver is decapitated and dismembered, but his head is somehow still "alive" because it bites the dinosaur soon after (Confirmed by Warren Graff via a Twitter reply).
- Mole in the City - The Pig Child floats into the sky upon being handed a bunch of balloons. He dies either when the balloons pop and he falls back to Earth or when he floats into space. (Death not seen)
- Mole in the City - The Mole dies when his fake mole explodes. (Death not seen)
- Cubtron Z - Some Generic Tree Friends likely died when the monster tore the buildings in half.
- Cubtron Z - Many Generic Tree Friends likely got burned to bone by Cubtron's vomit, causing their heads to explode.