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For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.

Bionis (Japanese: 巨神, Kyoshin, lit. Giant God; English dub: /baɪˈɒnᵻs/) is a titan in Xenoblade Chronicles. It is the organic counterpart to the Mechonis, and home to the Homs, Nopon and High Entia amongst other forms of organic life. It was also home of the Giants in the past. Bionis is locked in an ancient feud with Mechonis.


Bionis is a white, almost grey, titan that resembles a gigantic warrior. Similar to Mechonis, it wields a sword and has various protrusions on its body. Bionis' face is more humanoid than Mechonis', but does not possess a noticeable mouth.


Xenoblade Chronicles[]

Bionis vs Mechonis DE Intro

Bionis and Mechonis battling

Before the start of Xenoblade Chronicles, Bionis fought in a tremendous battle with Mechonis. Both appeared to be equally matched, although Bionis did manage to injure Mechonis by cutting off its left arm. The blade Bionis wields is said to have been the same Monado that is used by Dunban and Shulk during the game's story, however with noticeable differences. This Monado is much larger to fit Bionis, as well as being white and having a simple symmetrical design. Eventually both Bionis and Mechonis appear to die during the fight and end up locked in their final positions forever. It is later revealed in the game that they were not dead, just in an inactive state. This becomes the "creation of the world" story for the people of Xenoblade Chronicles.

The Bionis reawakens later, when Zanza exits Shulk's body and returns to controlling the Bionis' actions. He destroys Mechonis and attempts to destroy the party and all life on Bionis as well, but he is killed by Shulk with the Monado III before he could do so. Bionis collapses after the final battle, and its remains are present in the sea around Colony 9 in the new world.

Future Connected[]

One year later, Shulk and Melia travel to the Bionis' Shoulder, which had detached itself from the rest of the Bionis' remains after Zanza's death, and now floats next to Alcamoth high above the rest of the Bionis due to the large quantity of Hover Stones that it contained. Shulk and Melia fly toward Alcamoth in Junks in an attempt to reclaim it, but are shot down onto the Shoulder. They learn that a creature called the Fog King has appeared from a rift that opened in the sky above Alcamoth and that if the rift continues to grow larger, all of Bionis will be in danger. After Shulk upgrades his weapon into the Monado Replica EX+, they are able to destroy the Fog King and close the rift, saving the world from the unknown threat.

Xenoblade Chronicles 2[]

It is revealed in the ending events of Xenoblade Chronicles 2 that the creation of the universe of Bionis and Mechonis, and the universe of Alrest, are due to Klaus activating the Conduit, splitting the original world in two.

Xenoblade Chronicles 3[]

The Two Worlds Combining

The world of the Bionis and Mechonis beginning to merge with Alrest

Sometime after Alcamoth was reclaimed, Shulk discovered the Ontos core of the Trinity Processor on the shore of Colony 9. An unknown amount of time in the future, the world of the Bionis began to merge with Alrest into a single universe, an event that would destroy both worlds due to them being composed of opposing types of matter. Having made contact with each other as their worlds drew nearer, Nia and Melia formed a plan that would allow their people and cultures to survive and rebuild. They would each construct one half of an ark known as Origin that contained all of their societies' knowledge and their citizens' literal souls, which would allow them to be reborn after their worlds were separated and reconstructed back into their original states. This ark used the Ontos core as its foundation.

Bionis Origin

The Kevesi side of Origin

However, Origin was corrupted by the digitized souls of the people within it, creating the being called Z. Born from their fear of an uncertain future and their desire for stability, it hijacked the separation of the worlds. Instead of being reconstructed and then split back apart, both worlds were frozen in time and a third one was created between them, the world of Aionios, setting the events of Xenoblade Chronicles 3 into motion.

Most of the Bionis' remains became part of Aionios; its head and Eryth Sea combined with the Leftherian Archipelago to form the Erythia Sea, parts of Makna Forest combined with the Land of Morytha to create Maktha Wildwood, its leg merged with the Kingdom of Tantal to form the Aurora Shelf and The Ragmos Desolation, with a small part of it combining with the remains of Gormott to form Millick Meadows, Colony 9 and Tephra Cave combined with the remnants of the Cliffs of Morytha to form Yesterdale, and Valak Mountain merged with the interior of Genbu to form the Black Mountains along with Prison Island.

After Z∞ is defeated and Origin is reactivated, the worlds of Bionis and Alrest are returned to their original states from before the creation of Aionios. The two worlds, no longer made up of opposing types of matter, merge in earnest, restoring the world to what it was before it was divided by Klaus but still preserving the inhabitants of the old worlds.


In the Super Smash Bros. series[]

"The region known as Bionis' Leg is a vast landscape of lush fields, towering hills, and flowing rivers. But its name is no metaphor. No, it really is the leg of the titanic Bionis, a god whose body has become an entire world since it fell in the battle long ago. Whole races, such as Homs and High Entia, have lived and died on this great being."
— Super Smash Bros. for Wii U Trophy Description

Bionis makes an appearance in Super Smash Bros. for Nintendo 3DS / Wii U and Super Smash Bros. Ultimate, with its leg being the setting of the Gaur Plain stage. Bionis also appears as a trophy in Super Smash Bros. for Wii U.


  • The battle between the two gods seems to make reference to the Taoist concept of Yin (feminine, commonly colored as black or blue) and Yang (masculine, commonly colored as white or red). There are many similarities between the two concepts that lend credence to this theory.
    • Mechonis and Bionis share a similar black-vs.-white scheme that is fundamental to the symbolism of Yin and Yang.
    • Mechonis represents machines and technology, while Bionis represents life and nature.
    • Both are equals in combat, and end up locked together, representing the idea that Yin and Yang both complement each other despite their differences. One cannot exist without the other
    • They also bear some resemblance to Zoroastrian religious characters. Ahura Mazda the god of Zoroastrian faith and Ahriman the embodiment of evil.
  • According to Shulk in Xenoblade Chronicles 2, the Bionis is most likely smaller than the World Tree.




Xenoblade Chronicles[]

Xenoblade Chronicles: Definitive Edition[]

Xenoblade Chronicles 3[]

In the Super Smash Bros. series[]