TV-Series
Description
In the anime Tomica Kizuna Gattai Earth Granner, Core Granner Leo refers to the sentient, lion-themed artificial intelligence partner and its corresponding vehicle. Its physical form is a red car with golden decorations and prominent grey outer trim shaped like claws, with a distinctive blue middle section that serves as a docking point. This vehicle can be driven on its own but is designed to serve as the cockpit for a larger robotic form, activated by the Core Granner Tomica and steered with the Earth Handle. When its driver, the young protagonist Raiga Kudou, is inside, the Core Granner Leo combines with other units, most notably Gao Granner Cheetah, to form the giant robot Earth Granner Leo Cheetah.

Gao Granner Leo, the AI entity, possesses a powerful and memorable personality. It is self-assured, hot-blooded, and frequently cocky, proudly declaring itself the king of beasts. However, this bravado masks a comedic but genuine weakness inherited from its feline nature: a deep-seated fear of water. While it vehemently denies this fear, it has been known to affect its performance in battle, such as refusing to launch against an enemy because a giant puddle blocked its path. Despite this, its core nature is defined by fierce loyalty and a strong protective instinct toward its allies, firmly believing that its strength comes from the bonds it forms rather than from solitary power.

The central relationship in its existence is with its chosen driver and partner, Raiga Kudou. The two are drawn to each other due to their similar, daring personalities, with Gao Granner Leo believing they share an identical nature. This partnership is essential to its role in the story, as their high compatibility allows them to pilot effectively and defend the Earth from the Dark Spinner aliens, who seek to steal the planet's energy.

Gao Granner Leo undergoes significant character development through a unique journey of self-discovery. After experiencing its first dream, it is challenged by a vision of a giant white lion. This leads to a real-world confrontation in China with the white lion, who is revealed to be the former king of lions. Though physically outmatched at first, Gao Granner Leo rejects the former king's philosophy that a ruler must be solitary and isolated. By asserting that its true power comes from its desire to protect its friends and allies, it proves its worth. After achieving a new combination with Gao Granner Red Ptera, it defeats the white lion and is officially acknowledged as the new lion king and a hero of its era.

In terms of combat abilities, Gao Granner Leo is highly adaptable. Its base combination with Gao Granner Cheetah creates the Earth Granner Leo Cheetah robot, which wields an Accel Sword that can also function as an Accel Gun. Its capabilities are further expanded through a Type Change system using specialized Tomica vehicles. By integrating the Turbo Fire Tomica, it gains fire-based powers to become Earth Granner Leo Cheetah Turbo Fire. The Torque Rock Tomica bestows earth abilities, forming Earth Granner Leo Cheetah Torque Rock, and the GT-R Tomica enhances overall power, creating Earth Granner Leo Cheetah GT-R.