Megafusion

Guardian Megafusion (Japanese: ゴーレム, Gōremu, Eng. Translated: Golem, Hebrew: מיזוג מגה) is a mode that only the Guardians have access to use.

Abilities
Megafusion appears to look like half-transformations of the soldiers' core bricks, built together like legos. Ball joints and parts from Beast Titans are also seen, indicating that the guardians can not only merge the already-present bodies, but generate new ones.

In the Series
Guardian Megafusion was first seen in "Dojo Mojo", where Guardian Boreas fused with multiple Corrupted soldiers and went to Core Brick mode. His Megafusion (Japanese: ボレアース・ゴーレム, Boreāsu Gōremu, Eng. Translated: Golem Boreas) represents a giant.

In "Toxic Toxsa", Guardian Zephyrus fused with many Corrupted soldiers and went into Core Brick Mode. His Megafusion (Japanese: エウロス・ゴーレム, Eurosu Gōremu, Eng. Translated: Golem Eurus) represents a lizard.

In "Fight Knight", Guardian Notus fused with multiple Corrupted soldiers and went into Core Brick Mode. His Megafusion (Japanese: ゼピユロス・ゴーレム, Zepiyurosu Gōremu, Eng. Translated: Golem Zephyrus) represents a serpent.

In "Feeling the Heat", Guardian Eurus fused with multiple Corrupted soldiers and went into Core Brick Mode. His Megafusion (Japanese: ノトス・ゴーレム, Notosu Gōremu, Eng. Translated: Golem Notus) represents a falcon.

Appearance
Boreas is now a golem brick monster with pincers

Abilities and Attacks
superhuman strenght

pincer hands

Appearance
Zephyrus is now a giant lizard brick monster

Abilities and Attacks
superhuman strenght

superhuman speed

Appearance
Notus is now a giant serpent brick monster

Abilities and Attacks
superhuman strenght

superhuman speed

Appearance
Eurus is now a giant falcon brick monster

Abilities and Attacks
superhuman strengh

flight

Trivia

 * When Megafusion is activated, there is no helmet.
 * In Megafusion, the holes on the head core brick start glowing their respective color.
 * In "Lone Wolf", the Guardian's Tenkai Megafusion was part of Vilius' new evolution named Vilius Ultra Guardian Tenkai Megafuison.
 * Guardian Megafusion is not Titan Mode, but refered to as a Guardian Titan Mode as it makes them big to fight a Elemental Titan Knight.