Here are my thoughts on what a Dragon Hatchling has in dragon form and in Human (or any other form)...
Arcane Background (Psionics): All forms
Armored Hide*: The Hatchling has +16 M.D.C. Armor and +6 Toughness in dragon form. In other forms he has 1/2 this bonus (+8 MDC armor and +3 toughness)
Claws/Bite*: dragon form only
Fear*: In his natural form only
Fire Breath*: dragon form only
Flight*: dragon form only
Impervious to Fire: all forms
Infravision: all forms
Inherently Magical: all forms Arcane Background (Magic)
Limited Metamorphosis: well obviously all forms
Mighty: Strength of d12+4. They are also very resilient, starting with a d8 Vigor. All forms
Nigh-Immortality: all forms
Size +6*: with +6 toughness only in Dragon form
Slow Regeneration: all forms
Tail Lash*: Dragon form only
Reading Flaming Scales it sounds like it is in Dragon Form only... just as an FYI. And a Damage Field means you have to hit someone OR they have to hit you with a melee weapon to cause the damage. You could use a "Touch" attack that is +2 to hit but does not add your Strength die to damage (so it would just do a base 3d6 Mega-Damage)