Land Before Time/Monsterverse crossover

This is Littlefoot's grandmother, who is his maternal guardian along with Grandpa Longneck, after Littlefoot's mother was killed by a Sharptooth years ago.

Voice Reference: Miriam Flynn

This is Topsy's wife, and Cera's stepmother. She is also Tricia's mother, who is Cera's half sister

Voice Reference: Jessica Gee

This is Littlefoot's father, who was separated from his family by an Earthquake, and reunited with his son years later

Voice Reference: Kiefer Sutherland

This is Ducky and Spike's mom, who is biologically related to Ducky, and Spike is her adopted son

Voice Reference: Tress MacNeille

This is Petrie's mother

Voice Reference: Tress MacNeille

This is Mr. Thicknose, a wise dinosaur who has heard many things, despite not seeing everything. He gets by with what knowledge he can, while learning new things in the process, he is also a believer in the Ancient Guardians, and will go to any length to discover them.

Voice Reference: Dorian Harewood

This is Mo, a friend of the kids, and "Mud Brother" of Littlefoot

Voice Reference: Rob Paulsen

This is Guido, a friend of the kids, and a bit shy, nervous and panicky

Voice Reference: Rob Paulsen

This is Shorty, Littlefoot's adopted brother, a little stubborn and show off, but a good kid

Voice Reference: Brandon Michael DePaul

This is a character that's one of the bully type characters in the great valley, but is mainly reformed

Voice Reference: Whit Hetford

This is a character that's one of the bully type characters in the great valley, but is mainly reformed

Voice Reference: Jeff Bennett

This is a character that's one of the bully type characters in the great valley, but is mainly reformed

Voice Reference: Scott Menville

This is Doc, a middle aged dino that's tangled with lots of Sharpteeth, receiving a scar from one in his youth, and is idolized by Littlefoot. Doc is also known as the Lone Dinosaur by most legends. 

Voice Reference: Kris Kristofferson

This is Doc's lady friend from the tv series

Voice Reference: Susan Blu

This is an Ankylosaur that's a resident of the Great Valley, who has disagreements with Topps.

Voice Reference: Jeff Bennett

This is a good friend of Grandpa Longneck, and a Storyspeaker.

Voice Reference: Pete Sepenuk

This is one of the Egg Thief Brothers, who is the brains 

Voice Reference: Jeff Bennett (British accent)

This is one of the Egg Thief Brothers, who is the clumsy dimwit

Voice Reference: Rob Paulsen  (British accent)

This is a Deinosuchus that is nearsighted, and a villain met back in the 4th LBT movie

Voice Reference: Tress MacNeille

This is a Ichthyornis and a villain met back in the 4th LBT movie

Voice Reference: Jeff Bennett

This is Petrie's uncle, who was banished some years ago, for abandoning his herd and endangering lives and manipulating others, and his banishment is nearly over

Voice Reference: Michael York

This is a former friend of Pterano, and quite the creep

Voice Reference: Rob Paulsen (cockney accent)

This is a former friend of Pterano, and quite the jerk

Voice Reference: Jim Cummings

This is one of the main group of characters in the franchise, the leader of the kids in the valley, who lost his mother to a Sharptooth years ago

Voice Reference: Cody Arens

This is one of the main group of characters in the franchise, who met Littlefoot when his mother fought off a Sharptooth to protect them, fatally injured in the process

Voice Reference: Anndi McAfee

This is one of the main group of characters in the franchise, who Littlefoot ran into on his travels to the Great Valley

Voice Reference: Aria Noelle Curzon

This is one of the main group of characters in the franchise, who Littlefoot ran into on his travels to the Great Valley

Voice Reference: Jeff Bennett

This is one of the main group of characters in the franchise, who Littlefoot ran into on his travels to the Great Valley

Voice Reference: Rob Paulsen

Spike doesn't speak, but grunts

This is one of the main group of characters in the franchise, who Littlefoot and his friends come across while in the Mysterious Beyond, and was hatched by Littlefoot, and was a different Sharptooth from the others. He was reunited with his parents. In time Chomper is living in the valley with his friends.

Voice Reference: Max Burkholder

This is one of the main group of characters in the franchise, who came to the Great Valley with Chomper, and lives in the Secret Caverns with him

Voice Reference: Meghan Strange

This is one of the two parasitic Titans that surface after Godzilla was tracking them, and attacked the Great Valley, in an attempt to find a nesting ground to prosper

Voice Reference: Steve Blum

This is one of the two parasitic Titans that surface after Godzilla was tracking them, and attacked the Great Valley, in an attempt to find a nesting ground to prosper

Voice Reference: Gina Torres

This is one of the 3 Ancient Guardians, whose purpose is to protect all life from any evil that would befall it.

Voice Reference: Scarlett Johansson

This is Godzilla's daughter, who is brave, strong, and a bit of a show off. But all she wants is to be a great Guardian like her father, and make friends with everyone in the Great Valley

Voice Reference: Tania Gunadi

This is the rival of Godzilla, a winged hydra from the stars, bent on destroying all life in the galaxy. He was stopped by Godzilla, Rodan and Mothra thousands of years ago, for now....

Voice Reference: Benedict Cumberbatch

This is a follower of Ghidorah, and the one responsible for the death of Godzilla's father, Dagon. 

Voice Reference: Angela Bassett

This is a follower of Ghidorah, and a swift and cunning combatant

Voice Reference: Justin Theroux