Yeah, I developed it based on a fan-art I found while Googling. I should've put it up beforehand, I guess:
Here it is:
You can maybe think of making it centrally blue instead of red. My concept is that due to the power of mega evolution, it gains a perfect crystal structure. If you've read of perfect crystals, you'll know that any physical impacts on it get de-localized all around the structure, thus, direct impacts are near to impossible.
So, here's the idea.
Ability: Perfect Crystal (Doubles Def. due to perfect crystalline structure)
Defense doubled is calculated from the total defense like Pure Power and Huge Power.
Weight: 702.31 lbs.
New Moves: Aqua Jet (Lvl 15), Water Gun (Lvl 25), Water Pulse (Lvl 35), Surf (HM)
Mega Evolution: Cryogonite
Atk: 50>70 (+20)
Def.: 50>60 (+10)
Sp.Atk: 95>140 (+45)
Sp.Def: 135>160 (+25)
Total: 515>615 (+100)
Addition of the Water type helps in mitigating many weaknesses and covering up introduced weaknesses.
Its ability to become steam and re-condense as ice is now pronounced to overcome its Fire type weakness.
Its perfect crystalline structure helps it to de-localize impacts, thus, reducing damage from each impact.
Its higher speed makes it even more of a threat to its adversaries.
Susceptible to fast attackers using fighting and electric type moves.
Its ability is negated by abilities like Mold Breaker, leaving it physically very weak.
This pokemon can act equally as a quick attacker and a wall, but, is better used for offensive strategies due to lower HP hindering its tanking capabilities.
The Cryogonals usually possess an ability that allows them to turn into steam and vanish when temperatures rise. They can reform when the heat gets reduced. This also gives them the ability to absorb surrounding moisture and grow. This power lies dormant in them, which is released in dire situations and when a Cryogonal and its trainer bond perfectly. When this power is activated, the surrounding moisture is absorbed in, forming a special keystone imbibed with its life force, which makes it transform.