Q1: Can I use this card's When Digivolving When Attacking effect to suspend either my Digimon or my opponent's Digimon?

Yes, either can be suspended.

Q2: What does "effects don't affect" mean, exactly?

This effect prevents a card from being affected by effects. For example, your Digimon won't suspend if it's chosen for a "suspend 1 of your opponent's Digimon" effect, and its DP won't be reduced by 3000 if it's chosen for a "1 of your opponent's Digimon gets -3000 DP" effect.

Q3: Can a card that has an "effects don't affect" effect be chosen for an effect?

Yes, it can be chosen. For example, a Digimon that isn't affected by effects can be chosen for a "suspend 1 of your opponent's Digimon" effect.

Q4: Can a card that has an "effects don't affect" effect be given an effect?

Yes, it can. It won't be affected by it, but it can be given an effect. However, if an effect such as Security Attack is given to a Digimon that isn't affected by effects, the Digimon won't be considered to have that effect.

Q5: If a card is affected by an effect, then it later gains an "effects don't affect" effect, what happens to the effect that was affecting it?

As soon as it gains the "effects don't affect" effect, it will no longer be affected.

Q6: If a card has an "effects don't affect" effect, it gains an effect, then it later loses the "effects don't affect" effect, what happens to the effect that it gained?

It will be affected by the effect as soon as it can be affected by effects.

Q7: A card that has an "effects don't affect" effect was given an effect that triggers at a timing such as When Attacking. Will the effect trigger if that card later meets the trigger conditions?

If the Digimon isn't affected by effects upon the trigger timing, the effect won't trigger.

Q8: What does "may battle" mean, exactly?

This effect directly performs a battle. If this effect is activated, the chosen Digimon battle, as with the standard rules.

Q9: If 2 Digimon including a Digimon that has an "effects don't affect" effect are chosen for a "may battle" effect, can those Digimon battle?

Yes, they can battle. A card that has an "effects don't affect" effect can still be chosen for an effect. In addition, a battle itself is a rule that compares DP, not an effect. Therefore, a Digimon that isn't affected by effects can be chosen, and then it can battle. If it loses the battle, it will be deleted as normal according to the rules.

Q10: During an attack by this card, I used its All Turns effect to have it and an opponent's Digimon battle, and my opponent's Digimon was deleted in battle. Then, if the attack target successfully becomes an opponent's Digimon and it's also deleted in battle, do I use this card's Piercing to perform 2 security checks?

No, you only perform 1 security check for Piercing. Only 1 security check can be performed during a single attack, even if Piercing activates multiple times. However, if the number of security checks is modified by Security Attack, that number of cards will be checked in a single security check.

Q11: During an attack by this card, I used its All Turns effect to have it and an opponent's Digimon battle, and my opponent's Digimon was deleted in battle. Then, if the attack target successfully becomes an opponent's Digimon, it loses the battle, but an effect prevents it from being deleted, can I still activate this card's Piercing?

Yes, you can. Piercing is an effect that triggers and activates if an opponent's Digimon is deleted in battle during the attack, and it's processed immediately before the end of attack timing. Piercing will still trigger if the Digimon with Piercing successfully attacks a Digimon, even if another battle occurs during this battle.

Q12: A Digimon other than this card attacks, I used this card's All Turns effect to have this card and an opponent's Digimon battle, and my opponent's Digimon was deleted in battle. At such times, does this card's Piercing trigger?

No, it doesn't trigger. Piercing will only trigger if this card deletes an opponent's Digimon in battle during this card's attack.