

Q1: I have a Digimon with <Detach> that this card is linked to. That Digimon attacked my opponent's Digimon, but both Digimon had the same DP and both lost the battle. At such times, if I activate <Detach> immediately before my Digimon would be deleted and trash this card with Piercing in its link effects, only the opponent's Digimon would be deleted in battle, but can I activate Piercing in those link effects?
No, you can't. <Detach> triggers and activates immediately before both Digimon lose the battle and would be deleted. Piercing is lost when your opponent's Digimon is deleted, therefore you can't activate it.
Lv.3 Roleplaymon BT26-010 C Stnd./Appmon | Game | Role-playing/Seven Code <Detach ([Seven Code] trait)> (When this Digimon would leave the battle area other than by your effects, by trashing 1 of its specified link cards, it doesn't leave.) [When Attacking] By trashing 1 [Game], [Open] or [Seven Code] trait card from your hand, <Draw 2>. --- <Link> [Appmon] trait: Cost 3 (Plug this card from the hand or battle area sideways into the specified Digimon in the battle area.) Link: +DP+3000DP Link: <Progress> <Piercing> (When this Digimon attacks and deletes an opponent's Digimon, it performs any security checks it normally would.)
Lv.3 Roleplaymon BT26-010 C Stnd./Appmon | Game | Role-playing/Seven Code [Digivolve] Lv.2 w/[Appmon] trait: Cost 0 <Detach ([Seven Code] trait)> (When this Digimon would leave the battle area other than by your effects, by trashing 1 of its specified link cards, it doesn't leave.) [When Attacking] By trashing 1 [Game], [Open] or [Seven Code] trait card from your hand, <Draw 2>. --- -
Lv.3 Roleplaymon BT26-010 C
Stnd./Appmon | Game | Role-playing/Seven Code
[Digivolve] Lv.2 w/[Appmon] trait: Cost 0
{{Detach|Seven Code|trait}}
[When Attacking] By trashing 1 [Game], [Open] or [Seven Code] trait card from your hand, <Draw 2>.
---
<Link> [Appmon] trait: Cost 3
Link: +3000DP
Link: <Progress> <Piercing> (When this Digimon attacks and deletes an opponent's Digimon, it performs any security checks it normally would.)
Lv.3 ロープレモン BT26-010 C 並/アプモン | ゲーム | ロープレ/セブンコード ≪分離《特徴「セブンコード」》≫(このデジモンが自分の効果以外でバトルエリアを離れるとき、このデジモンの指定のリンクカード1枚を破棄することで、離れない) 【アタック時】自分の手札から、特徴「ゲーム」/「開放」/「セブンコード」を持つカード1枚を破棄することで、≪2ドロー≫。 --- 〈リンク〉特徴「アプモン」:コスト3(手札/バトルエリアから、このカードをバトルエリアの指定のデジモンに横向きで差し込む) リンク: +DP+3000DP リンク: ≪プログレス≫≪貫通≫