★Delving into Regigigas★

The basis is probably "Gigantomachia", the battle between Zeus and the Giants (Gigas)...?this particular "Gigas" seems to be "plural form of Giga" and not "second half of Regigigas' name", since in Japanese they tend to prefer "Gigant(es)" over "Giant(s)"

Regigigas in her prime, a true giant, versus prime Arceus After the loss of her comrades, an enraged Regigigas finally catches the god in her Crush Grip

However, she is struck by prime Arceus' Judgment attack...

...and loses all of her power

★Beginning of Slow Start★

Skillful fingertips

What did my children dooo!?

Her body is bound by unidentifiable black chain-looking things(the black markings)

Gigas is thoroughly crushed by despair, having lost everything. Her condition won't improve!

Now with no companions, she decided to create underlings out of convenient materials.

A fine job, if I do say so myself...!

Nooot~ sure when she created the Regi kids

★The original Gigas must have been so powerful, they (the gods) feared the giants would become a threat to their status...Otherwise, they wouldn't have sealed her away so tightly! Gigas is STRONG!

Snowpoint Temple

Desert Ruins

Island Cave

Ancient Tomb

However, afraid of the surviving giants, humans sealed them away.