Physiology
Regigigas shares several traits with the Regis. For instance, it has seven dot-like "eyes" arranged in a specific pattern. It has six spots that are apart from its eyes, which seem to be gemstones. These gemstones seem to represent the Regis with the red gems representing Regirock, the blue gems representing Regice and the silver gems representing Registeel. It has a golem-like shape and long arms with short legs. Its body is covered in black stripes, and it has moss growing in its back and feet, which may indicate it has been asleep for a long time.
Gender differences
Regigigas is genderless.
Special abilities
Regigigas has the ability Slow Start. Slow Start is an ability that causes Regigigas's Attack and Speed to be halved the first few turns. According to its Pokédex entries, its extremely high base attack stat, and its moves Superpower and Crush Grip, it has colossal strength, enabling it to move continents, or at least how the legend goes. Crush Grip is the signature move of Regigigas.
Behavior
Despite being stronger than a Hummer, this massive Pokemon is very relaxed. Its ability slows it down considerably for a couple turns, making it imperative you protect it. But once it's fully operational, Regigigas is virtually indestructible! As for defeating it, you had better have a powerful Fighting type; it's the only thing that can put a dent in this brute.
Habitat
Diet
Main article: Pokémon food
Due to its ability reducing its potential, it is in league more with Slaking than other legendaries.
Although it is thought to be unique, it is possible to see and fight another, under the ownership of Palmer along with a Heatran and Cresselia in the 49th consecutive battle in the Battle Tower.
It is also the only Pokémon who can learn TMs that cannot learn TM17 (Protect) or TM44 (Rest).
Regigigas is the only one of the Regis not to have its type in its name. Regirock is a Rock-type, Registeel is Steel, and Regice is an Ice-type.
Origin
Regigigas is based on a golem and a giant.
Name origin
The first part of its name is Regi, king. The last part of its name, gigas, means Giant.