Grogu spent much of his early years in the Jedi Temple on Coruscant, learning the ways of the Force from various masters. When the Great Jedi Purge occurred, he was taken from the temple by the heroic Kelleran Beq. What happened next is unclear, but for a number of years Grogu did what he could to survive, including concealing his abilities from others. Such caution proved necessary, as many came in search of him for various ends.
By the time Grogu was around fifty years old, still little more than an infant in the reckoning of his species, he had ended up in the hands of a violent group on the planet Arvala-7. Various bounty hunters had been sent to try and retrieve him; the lucky ones escaped with their lives. It was only the unlikely team of the Mandalorian and IG-11 who managed to breach the facility. However, Mando was forced to neutralize the assassin droid, who had been sent to kill Grogu while he had been hired to bring him back alive.
After a few harrowing experiences together, Mando brought Grogu back to Nevarro where his client waited. However, after delivering “the Child” to the remnant Imperials, the Mandalorian reconsidered his actions. He returned and rescued Grogu, and was aided by fellow Mandalorians in making his escape. This aid was timely, as the client responded by renewing the bounty on Grogu, leading to the pair being targeted by the Bounty Hunters’ Guild. With his unlikely new protector, Grogu fled from world to world.
Eventually, Greef Karga of the guild reached out to the Mando, attempting to reach a peaceful settlement. Correctly suspecting a trap but realizing that he and Grogu couldn’t keep running forever, the Mando took precautions. Recruiting Kuiil the Ugnaught, a rebuilt and reprogrammed IG-11, and the former Rebel trooper Cara Dune, the pair returned to Nevarro. They soon gained another ally after Grogu used his abilities to heal Greef Karga.
Unfortunately, Karga soon revealed that things on Nevarro had gotten worse, with more Imperials arriving to occupy the planet. Worse, they proved to be under the command of Moff Gideon, a ruthless Imperial governor who sought Grogu for his own ends. Only with the aid of a Mandalorian armorer were the motley allies able to thwart Gideon for the time being, but Kuiil and IG-11 were lost in the process. As such, the Mandalorian-revealed now to be named Din Djarin-set out to return Grogu to his people: the Jedi.
After several adventures, the pair met Ahsoka Tano, a former Jedi. By communicating with Grogu, Ahsoka learned what she could of his past and disclosed it, along with his name, to Djarin. Based on Grogu's attachment to the bounty hunter, Ahsoka refused to train him, having seen the (Anakin Skywalker) dangers such feelings posed to a Jedi. At Djarin's insistence, she told him to take Grogu to a ruined temple on Tython where he might be able to find a master for the youngling. Regrettably, Grogu was left vulnerable and abducted by several Dark Troopers dispatched by Moff Gideon.
Grogu was held aboard Gideon's Imperial Light Cruiser but rescued by the efforts of both Din and several allies and the arrival of the Jedi Master Grogu had contacted: Luke Skywalker. Luke took Grogu with him and sought to continue the youngling's Jedi training, but Grogu missed Din and was distracted. Ultimately, Luke spoke with Grogu and proffered two objects: the lightsaber of Luke's own mentor, Jedi Master Yoda, and a shirt of beskar mail that Din had brought for Grogu. Luke then gave Grogu a choice: take the lightsaber and become the first student in Luke's new Jedi Order or take the mail and rejoin Din for however long the much shorter-lived human's life lasted.
Choosing the latter, Grogu traveled to Tatooine and was reunited with his former caretaker. After an adventure helping Boba Fett and the denizens of the desert planet, the two set out in Din's new N-1 Starfighter to continue their journey together. This ultimately led them to a new Mandalorian enclave, where Din sought to learn how he might make amends for the "sin" of removing his helmet. Informed that he must return to Mandalore and bathe in the planet's Living Waters, Din took Grogu back to Nevarro in hopes of rebuilding IG-11 to help them navigate the supposedly toxic planet of Mandalore.
Though this effort proved unsuccessful, the pair eventually obtained an astromech droid to accompany them to the planet. With its aid, they learned that Mandalore's atmosphere was in fact breathable and began exploring the ruins beneath the old capital of Sundari. When a monstrous cyborg set upon them and captured Din, it fell to Grogu and the astromech to return to their ship and fly for help. This came in the form of Bo-Katan Kryze, who helped to rescue Din and later joined the pair as they returned to the Mandalorian enclave, both warriors having been immersed in the Living Waters.
Din soon sought to help Grogu embrace "the Way" of the Mandalore, in spite of Grogu's relatively young age and inability to speak. As the Armorer forged a new plate for him with Din's mudhorn symbol on it, Grogu recalled his experiences during Order 66. Eventually, Din's Mandalorians and those who had previously followed Bo-Katan joined forces and set out to retake Mandalore. Grogu received a new conveyance for this expedition, IG-11 having been rebuilt into a machine he could pilot dubbed "IG-12."
Grogu helped keep the peace between the two contentious Mandalorian groups after arriving on the planet. However, they soon discovered that Moff Gideon, who had escaped New Republic custody, had established a secret base on Mandalore. Grogu and the Mandalorians were soon locked in battle with Gideon's forces, including Imperial Commandos and a trio of Imperial Praetorian Guards whom Grogu engaged to rescue Din. Despite IG-12 being disabled during the fighting, Grogu and Din were able to defeat the Praetorians, and Grogu later used his Force abilities to shield Din and Bo-Katan from the inferno of a crash-landing ship.
With Gideon's forces defeated, the Mandalorians reclaimed their homeworld, and Din assumed official guardianship of Grogu by adopting him as his own son. After a brief stopover at a New Republic outpost, the two returned to Nevarro to establish a new home together.
LEGO Star Wars: Rebuild the Galaxy[]
Spoiler warning: Plot or ending details follow.
In the rebuilt galaxy, Grogu is the ward of a villainous Lando Calrissian, a bounty hunter who refers to himself as "the Landolorian." Apparently malevolent himself, Grogu expressed eagerness when he and his guardian were approached by Darth Rey and Rose Tico, who wished to hire them to hunt down Sig Greebling.