Sharkboy (The Adventures of Sharkboy and Lavagirl)
Shalraths/Vores (Quake series)
Shamblers (Quake series)
Kat (Kid vs Kat)
Snare (Kameo: Elements of Power)
Xenomorphs (Alien Franchise)
Shippo (Inuyasha); via technique called the Heart Scar
Soul Evans (Soul Eater)
Guiron (Gamera vs Guiron)
Bullsquids (Hλlf-Life series)
Ichthyosaurs (Hλlf-Life series)
Enobaria (The Hunger Games)
Chompies (The Skylanders)
The Ravenous Octomaw (Splatoon)
Various Monsters (Monster Inc Franchise)
Mileena (Mortal Kombat series)
Changelings (My Little Pony: Friendship is Magic); formerly, except Queen Chrysalis
Princess Luna (My Little Pony: Friendship is Magic); only in Nightmare Moon form
Winterchillas (My Little Pony: Friendship is Magic); as Winterzillas
Various Kaiju (Ultraman series)
Thriller (Michael Jackson's Thriller)
DIO (JoJo's Bizarre Adventure)
Ferasan (Star Trek Online)
Avian Mutants (System Shock)
Gorilla-Tigers (System Shock)
Zora Ideale (Black Clover)
Denji (Chainsaw Man)
DIO Brando (JoJo's Bizarre Adventure) bares his fangs as a vampire.
Arlong's (One Piece) teeth are sharp enough to cut through stone, metal, and flesh alike.
Hody Jones’ (One Piece) teeth are even more vicious in appearance and lethality than Arlong's, due to overdose on Energy Steroids.
In her snow Logia form, Monet (One Piece) can change her teeth into fangs made of hardened snow.
Dellinger (One Piece) has fishman fangs.
Charlotte Katakuri (One Piece) reveals that underneath his scarf, his mouth is composed of massive fangs.
Moka Akashiya (Rosario + Vampire) bares her fangs.
The Jaw Titan (Attack On Titan) has very strong and sharp teeth.
Haley Long (American Dragon:Jake Long)
Ripjaws (Ben 10)
Kevin 11 (Ben 10) possesses Ripjaws' sharp teeth.
Patrick Star (Spongebob Squarepants)
Robin (Teen Titans Go!)
As a Cambion, Raven (Teen Titans Go!) possesses retractable sharp teeth.
Victor Creed/Sabretooth (Marvel Comics)
James "Logan" Howlett/Wolverine (Marvel Comics)
Morjak (Marvel Comics) has another face and mouth on his stomach with rows of razor-sharp teeth.
Stitch (Lilo & Stitch)
Dinosaurus (Image Comics)
John Eisenhart/Hulk 2099 (Marvel Comics)
Bashmouth (Ben 10 Reboot) possess both natural sharp fangs and retractable metal fangs in front of them.
Todd Arliss/Tiger Shark (Marvel Comics)
Wulf (Danny Phantom)
Empress She-Wolf (Danny Phantom)
Dark Danny/Dan Phantom (Danny Phantom)
Princess Dorathea (Danny Phantom)
Changelings (My Little Pony: Friendship is Magic)
Princess Luna/Nightmare Moon (My Little Pony: Friendship is Magic)
Human Fly (Marvel Comics)
Ronnie Anne Santiago (The Loud House and The Casagrandes)
Bobby Santiago (The Loud House and The Casagrandes)
Curtis Connors/Lizard (Marvel Comics)
Venom (Marvel Comics)
Sugar Man (Marvel Comics)
Arkillo (DC Comics)
Nanaue/King Shark (DC Comics)
Shadow King (Marvel Comics)
Waylon Jones/Killer Croc (DC Comics)
Liltotto (Bleach) using "The Glutton" to morph her mouth into a maw full of fangs.
The Fang Gang (Mixels)
Sunset Shimmer (My Little Pony: Equestria Girls) as a demon.
King Andrias Leviathan (Amphibia)
Vampires (30 Days of Night)
The Spawn (The Deadly Spawn)
A Mauvais Dentes (Grimm)
Guiron (Gamera vs Guiron) possesses "60 times more teeth than a piranha".
Sunny Baudelaire (A Series of Unfortunate Events) was born with sharp teeth and loves to bite things. In fact there's very little that Sunny doesn't enjoy biting.
Enobaria (The Hunger Games) apparently had her teeth sharpened so she could rip tributes’ throats out.
The Leviathans (Supernatural) can manifest sharp teeth, as their main weapon and method of eating.
A Vampire (Supernatural) bares her fangs.
Werewolves (Teen Wolf)
Werecoyotes (Teen Wolf)
Kanimas (Teen Wolf)
Wendigos (Teen Wolf)
After becoming a Metahuman by getting bitten by kryptonite-infected cave bats, Buffy Sanders (Smallville) had been gifted the power to have sharp fangs in order to not only suck the blood from others, but to also replicate the powers from superpowered enemies, like other Metahumans for example.
Count Vladislaus Dracula (Van Helsing) prepares to dig his teeth into an unfortunate victim.
Werewolves (The Vampire Diaries)
Red (Shark Night 3D) has unnatural sharp teeth.
Smiley Men (The New Mutants)
A Xenomorph (Alien: Isolation)
Bullsquids (Hλlf-Life series) have extremely sharp teeth.
After their reanimation into Lich Zombies, the Fork Maidens (New Blood Interactive's DUSK) have obtained razor-sharp teeth due to being distorted by eldritch energies.
An Ichthyosaurs' (Hλlf-Life series) sharp teeth gives them an incredibly strong bite.
Chompies (The Skylanders series).
The Ravenous Octomaw (Splatoon) has a mouth full of razor-sharp teeth.