Colossus

The Colossus was a robot built by Raven in JAFT 2 to absorb and exploit the power of the Magnum Rifts. It serves as the main antagonist of that game.

Forms
The Colossus takes on multiple forms depending on the number of Magnum Rifts it has collected.

First Form (One Rift)
When Jeremy and his friends first encounter The Colossus in JAFT 2 in Tusky Village, it will have only the Rift of Power. It is able to primitively speak in this state and its power is relatively minimal. Although it has great physical strength, it is weakened by its stupidity.

Second Form (Two Rifts)
Shortly after the Colossus is fought the first time in JAFT 2, The Colossus takes the Rift of Energy, absorbs it, and secludes itself deeper into the Megaforest. This form is able to heal itself using the Rift of Energy. While still lacking in mental abilities, it is slightly more powerful, but not by much.

Third Form (Riftless Colossus Magnum)
The third Colossus form is the weakest of all because it has no Rifts. However, Raven has made some modifications to make it actually viable in combat, even without Magnum Rifts. This form of the Colossus can switch between two defense modes, one that is strong against physical attacks and one that is strong against magical attacks. These defense modes are noted by yellow and pink shields on its shoulders respectively.

Perfect Colossus
Once Jeremy and his friends defeat the Platinum Masks at Xyzal Lighthouse, the Colossus gains all five Magnum Rifts. It begins to grow exponentially until it is the size of a planet. It then begins to charge a gigantic laser power from Dark Matter that will destroy the entire planet. As implied by the name, this might be the most powerful form The Colossus can take.

Inside the Colossus, Jeremy and his friends make it to the core after shutting down its generators. They find that the core had absorbed the Magnum Rifts and trapped them in a spherical shell. Once they break this shell, the Magnum Rifts spill out, and begin attacking Jeremy and his party. Also, The Colossus Core evolves into a ball of plasma surrounded by molten metal that gains sentience. This fight is the final boss in JAFT 2.In the final phase of the fight, the Colossus Core will nullify most magic attacks done to it, and has a naturally high crit resistance. It can also revive the Magnum Rifts whenever Jeremy and his friends destroy them. Not only that, but it can fire lasers, bombs, and molten plasma at you. However, defeating this enemy will reveal the true ending of the game.