Ryuusei no Rockman 2, Ultimate Form!!!

Tribe King, the ultimate transformation!!!

Finally there's the ultimate transformation, the combination of all three forms, Tribe King. Its charged shot is Over Slasher, which is said to be as strong as a Mega Class card. Its KFB is Kaiser Delta Breaker.

And here are some scans from corocoro comics:
There are some more details about the already announced new transformations. They will retain similar abilities to the Star Force transformations in the first Ryuusei no Rockman game. You will have an elemental charged shot, elemental weakness, and like Star Force Big Bang, you will gain a giga card from countering attacks, called as "Kizuna Force Big-Bang" this time.

Tribe King. Its charged shot is Over Slasher, a wide sonic-boom attack which is said to be as strong as a Mega Class card. Its Kizuna Force Big Bang attack is called as Kaiser Delta Breaker, a three pronged sword attack that looks similar to Blues' Delta Ray Edge.

The name of the yeti boss is revealed to be Yeti Blizzard. Also, another boss is revealed, a giant dinosaur called Brachio Wave. Its head alone can take up half the screen. The bosses in this game are said to be the remaining creatures from various legends.

Then there are the Double Tribe forms. For now their regular charged shots are unknown, but we do know their KFBs. Dinosaur Berserk's is Vanishing Blazer, Berserk Shinobi's is Elemental Blade, and Shinobi Dinosaur's is Enmarepuujin. On top of that, it appears there may be three more Double Tribe forms, which are reversals of the currently known forms (i.e. Berserk Dinosaur, Shinobi Berserk and Dinosaur Shinobi).

Thunder Berserk: (Elec)

- Charged Shot: Thunder Slash

- Kizuna Force Big-Bang: Thunderbolt Blade

Fire Dinosaur (Fire)

- Charged Shot: Dino Cannon

- Kizuna Force Big Bang: Genocide Blazer

Green Shinobi (Wood)

- Charged Shot: Shinobi Shuriken

- Kizuna Force Big-Bang: Fuumashippuujin {Wind Slicing Hurricane Formation}

You also have probably heard about the new Double Tribe forms, and now we know their

Kizuna Force Big Bang attacks:

Dinosaur Berserk - Vanishing Blazer (Elec)

Berserk Shinobi - Elemental Blade (Wood)

Shinobi Dinosaur - Enmarepuujin {Burning Spectacular Wind Formation} (Fire)

In related info, the continuing animated series, Ryuusei no Rockman Tribe, will begin in November.

Credits: atomic-fire.com, rockman.soi13.com, exe-undersq.com