

Q1: Do I have to choose an opponent's Digimon for this card's inherited effect?
No, you don't have to choose an opponent's Digimon.
Q2: Does my opponent's Digimon attack even if I choose an opponent's Digimon that can't attack for this card's inherited effect?
No, they can't attack using a Digimon that can't attack.
Q3: An opponent's Digimon is attacking using an effect at the end of their turn. If I choose an opponent's Digimon for this card's inherited effect, does that Digimon attack?
No, your opponent can't attack using that Digimon. A new attack declaration can't be made during an attack. In such cases, even if you choose an opponent's Digimon for this card's inherited effect when there is already an attacking Digimon, your opponent can't attack with the chosen Digimon.
Q4: Can I choose a Digimon that isn't affected by effects for this card's inherited effect and have it attack?
Yes, you can choose a Digimon that isn't affected by effects for this and have it attack. Such Digimon aren't affected by effects, but they can be chosen. In addition, "your opponent attacks with the chosen Digimon" in this card's inherited effect affects a player, therefore your opponent must attack with the chosen Digimon if it can attack.
Lv.5 Datamon BT22-060 C Ultimate | Virus | Machine/DM/Ver.5 <Blocker> [On Play] [When Digivolving] Until your opponent's turn ends, their <De-Digivolve> effects don't affect this Digimon, and it gets +1000 DP for each of its face-down digivolution cards. --- [End of Opponent's Turn] [Once Per Turn] You may choose 1 of your opponent's Digimon. Your opponent attacks with the chosen Digimon.
Lv.5 Datamon BT22-060 C Ultimate | Virus | Machine/DM/Ver.5 [Digivolve] Lv.4 w/[DM] trait: Cost 3 <Blocker> [On Play] [When Digivolving] Until your opponent's turn ends, their <De-Digivolve> effects don't affect this Digimon, and it gets +1000 DP for each of its face-down digivolution cards. --- [End of Opponent's Turn] [Once Per Turn] You may choose 1 of your opponent's Digimon. Your opponent attacks with the chosen Digimon.
Lv.5 Datamon BT22-060 C ultimate | Virus | Machine/DM/Ver.5 [Digivolve] Lv.4 w/[DM] trait: Cost 3 <Blocker> [On Play] [When Digivolving] Until your opponent's turn ends, their <De-Digivolve> effects don't affect this Digimon, and it gets +1000 DP for each of its face-down digivolution cards. --- [End of Opponent's Turn] [Once Per Turn] You may choose 1 of your opponent's Digimon. Your opponent attacks with the chosen Digimon.
Lv.5 ナノモン BT22-060 C 完全体 | ウィルス種 | マシーン型/DM/Ver.5 ≪ブロッカー≫ 【登場時】【進化時】相手のターン終了まで、このデジモンは相手の≪退化≫の効果を受けず、このデジモンの裏向きの進化元1枚ごとに、DP+1000。 --- 【相手のターン終了時】[ターンに1回]相手のデジモン1体を選べる。相手は、選んだデジモンをアタックさせる。