Elemental Fusion

Elemental Fusion is an ability BoBoiBoy gains that involves fusing Elemental Forms into an entirely new form. This ability first debuted in BoBoiBoy Movie 2.

Summary
Unlike Elemental Split, which involves splitting BoBoiBoy's powers into individual Elements who function independently, Elemental Fusion involves fusing two forms into a singular much more powerful form. Retak'ka has remarked that Elemental Fusion is much more powerful than splitting the Elemental Forms. Retak'ka also claimed that Elemental Fusion is the true ability of the Elemental Form power. With seven elements in BoBoiBoy's possession, 21 two-element fusions and 35 three-element fusions can be harnessed.

To fuse, the fusing Elements must first be summoned via Elemental Split. Then the two elements must interact with each other with BoBoiBoy's right hand, which is where his Power Band is placed, by striking fists with one another, high-fiving, holding hands, fist bumps etc., after which, the two Elements will fuse together into the new form; Elemental Fusion, although powerful, this ability uses and drains a lot more energy and strength than Elemental Split, seeing as how BoBoiBoy collapsed in exhaustion after consecutively performing three different Elemental Fusions.

There are currently only six known Elemental Fusions, but BoBoiBoy seems to be able to fuse more than just the ones known.

Elemental Fusions
Listed below are the known Elemental Fusions:

BoBoiBoy FrostFire

 * Fusion: BoBoiBoy Blaze + BoBoiBoy Ice
 * First Appearance: BoBoiBoy Movie 2

BoBoiBoy Glacier

 * Fusion: BoBoiBoy Quake + BoBoiBoy Ice
 * First Appearance: BoBoiBoy Movie 2

BoBoiBoy Supra

 * Fusion: BoBoiBoy Thunderstorm + BoBoiBoy Solar
 * First Appearance: BoBoiBoy Movie 2

BoBoiBoy Sori

 * Fusion: BoBoiBoy Thorn + BoBoiBoy Solar
 * First Appearance: BoBoiBoy Galaxy (Season 2) - Issue 9

BoBoiBoy Rumble

 * Fusion: BoBoiBoy Quake +  BoBoiBoy Thunderstorm
 * First Appearance: BoBoiBoy Galaxy (Season 2) - Issue 15

BoBoiBoy Sopan

 * Fusion: BoBoiBoy Solar + BoBoiBoy Cyclone
 * First Appearance: BoBoiBoy Galaxy (Season 2) - Issue 20

Video
Elemental Fusion