Unexpected rain sweeper
Ability: Pressure/ Flame Body
EVs: 252 SpAtt/ 252 Spd/ 4 SpDef
Item: Life Orb
Hurricane: Highly powered STAB move, especially in the rain. The 30% chance of confusion is a neat bonus.
Fire Blast: Although used in the rain, Fire Blast still hits hard coming off a 125 base special attack and life orb.
Hidden Power Fighting/ Ice/ Ground/ Grass: Unfortunately Moltres hasn't got the biggest movepool so Hidden Power will make do. HP Fighting is for Rock types, in particularly Tyranitar and also hit Dark types fairly hard as well as normal types and some Ice types harder in the rain. Also used for hitting Heatran. Ice is for Ground and Dragon types. Ground hits Heatran harder than HP Fighting. Grass is for problematic Water types like Gastrodon.