Aron
No. 304
Steel
RockOverbred
Abilities
The doc breeds for Sturdy.
Egg
Its egg group. Pick one to list every Pokémon in the doc that can breed with it.
50%50%IVs and nature
31HP
Atk
31Def
31SpA
31SpD
31Spe
Nature
JollySpeSpA
orAdamantAtkSpA
Egg moves
The doc lists none worth breeding for.
Everything it can hatch with, from the game's data
Trade value
Nothing in this line is on the value list.
PvP usage
Hidden Power calculator
HPOdd
AtkOdd
DefOdd
SpAOdd
SpDOdd
SpeOdd
The spread the 
Trade Department breeds for Hidden Power Dragon. Any other IV pattern that gives Dragon is traded as imperfect.
Trade Department breeds for Hidden Power Dragon. Any other IV pattern that gives Dragon is traded as imperfect.Want a type? Pick it to fill in the best IVs for it.