T10 Heatblast/Hotstuff (+ Ultimates)

Heatblast is the Hydraimitrix's (Thadd) sample of a Pyronite from the Pyros.

Hotstuff is the Orthusimitrix's (Jess) sample of a Pyronite from the Pyros.

Ultimate Heatblast is the evolved version of Thadd's Heatblast

Ultimate Hotstuff is the evolved version of Jess' Hotstuff.

Unevolved Appearance (Thadd)
Heatblast is similar to OV Heatblast, his body is covered in red and black hardened magma, the left side of his body's fire is dark-blue while the other side is purple. The inner of his head's fire is blue and the outer is purple.

The Hydraimitrix symbol is located on his chest.

Unevolved Appearance (Jess)
Hotstuff has more of a OS appearance, She has a red hardened magma body with a dark-golden flame body and a pony-tail made out of fire. She has a slight crease of breast and a skinny waist. Her inner-head is hot-pink.

The Orthusimitrix symbol is in the same spot.

Evolved Appearance (Thadd)
Ultimate Heatblast is more tall and bulky with massive forearms and hands and fire bursting out of his shoulders. His rock body is more black-brown and his fire body is dark-blue with his head and shoulders dark-purple. He has scar-like cuts over his eyesockets.

Evolved Appearance (Jess)
Ultimate Hotstuff is similar to U. Heatblast and has a larger ponytail that goes down to her rear. She has a large bulge on her chest and a pink fire body.

Powers/Abilities/Weaknesses/Genders
For information about them, check out the Ben 10 Planet (or Fanfiction) Wiki page.

Unevolved Transformation (Thadd)
...Thadd's body begins covering in hardened magma as his hair bursts into his flames, The crack-like pattern on his body appears and his head turns into a floating fiery skull...

Unevolved Transformation (Jess)
''...Jess' skin begins thickening and covering in hardened magma, Her chest bulges slightly and a massive ponytail bursts out of her head. Her body bursts into flames as the crack-like pattern appears on her body...''

Evolved Transformations
...Heatblast/Hotstuff twist their symbol slighty and then smack it down, Tongs push out of the symbol and their body is slowly covered by a green light as they transform into their ultimate form...

Credit
Credit to thewalrusclown for the base of Hotstuff.