The ATK/DEF of “Gradius’ Option” is the same as the current ATK/DEF of the selected “Gradius”, not the original ATK/DEF. So if you equip “Axe of Despair” to “Gradius”, the ATK of “Gradius’ Option” will also increase by 1000 points.
Equipping “Axe of Despair” to “Gradius’ Option” has no purpose. Activating “Reinforcements” targeting “Gradius’ Option” serves no purpose. “Luminous Spark” on the field will not change the ATK/DEF of “Gradius’ Option”. It always has the same ATK/DEF of the selected “Gradius”.
If the selected “Gradius” is flipped face-down, “Gradius’ Option” is destroyed.
If the selected “Gradius” is temporarily removed from play by the effect of “Interdimensional Matter Transporter” or “Dimensionhole”, “Gradius’ Option” is destroyed.
If “Gradius’ Option” is temporarily removed from play by the effect of “Interdimensional Matter Transporter” or “Dimensionhole”, when it returns to the field you must select a new “Gradius”. If there is no “Gradius” on the field, it is destroyed.
If you pick up “Gradius’ Option” by the effect of “Cyber Jar” you cannot Special Summon it, even if “Gradius” is also in the 5 cards you picked up. It is placed in your hand instead.
If you pick up “Gradius’ Option” by the effect of “Morphing Jar #2” you cannot Special Summon it, and it is sent to the Graveyard.
Netrep Rulings:
“Gradius’s Option” copies the ATK/DEF value of the “Gradius” chosen when “Gradius’s Option” is summoned at all times.
If “Gradius’s Option” would be affected by an effect that alters “Gradius’s Option’s” ATK or DEF value, “Gradius’s Option’s” ATK or DEF value will not change.
“Gradius’s Option” may only be initially Special Summoned from the hand.
If “Skill Drain” is active on the field, “Gradius’s Option’s” ATK and DEF will be 0.
“Gradius’s Option” may not be searched by the effect of “Witch of the Black Forest” as “Gradius’s Option” does not have a specific DEF value.