

Q1: Can I link a card without Link with a "you may link" effect?
No, you can't.
Q2: If I used this card's Your Turn effect to play or use a card revealed from the deck, when do I return the rest of the cards to the deck?
If you played the card, the remaining cards are returned to the deck after it's played to the battle area. Then you can activate any effects that triggered from it entering play. If you used a card, the cards are returned to the deck after the used card's Main effect has been resolved and the card has been trashed.
Q3: What happens when I activate this card's Your Turn effect and use a BT26-102 Seven Code PAD that was revealed from the deck?
Place the specified cards from your battle area, link cards or trash under a specified Digimon with the used BT26-102 Seven Code PAD's Main effect and digivolve that Digimon into Dantemon. Then, perform a digivolution bonus draw from the unrevealed deck. Afterwards, trash BT26-102 Seven Code PAD and perform the "return the remaining cards to the deck" action.
Q4: A Seven Code trait card gets linked to this card, and this card's Your Turn effect and the linked card's When Linking effect trigger simultaneously. If I activate this card's Your Turn effect first and use BT26-102 Seven Code PAD's Main effect, can I activate the When Linking effect on the card linked to this card after placing it as a digivolution card.
No, you can't.
Lv.3 Copipemon BT26-084 C Stnd./Appmon | System | Copy & Paste/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.) [Your Turn] [Once Per Turn] When this Digimon gets linked, reveal the top 3 cards of your deck. You may play or use 1 [Seven Code] trait card among them with the cost reduced by 3. Return the rest to the top or bottom of the deck. --- <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: [When Linking] You may link 1 non-white level 4 or lower [System] or [Seven Code] trait card from your trash to this Digimon without paying the cost.
Lv.3 Copipemon BT26-084 C Stnd./Appmon | System | Copy & Paste/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.) [Your Turn] [Once Per Turn] When this Digimon gets linked, reveal the top 3 cards of your deck. You may play or use 1 [Seven Code] trait card among them with the cost reduced by 3. Return the rest to the top or bottom of the deck. --- -
Lv.3 Copipemon BT26-084 C
Stnd./Appmon | System | Copy & Paste/Seven Code
[Digivolve] Lv.2 w/[Appmon] trait: Cost 0
{{Detach|Seven Code|trait}}
[Your Turn] [Once Per Turn] When this Digimon gets linked, reveal the top 3 cards of your deck. You may play or use 1 [Seven Code] trait card among them with the cost reduced by 3. Return the rest to the top or bottom of the deck.
---
<Link> [Appmon] trait: Cost 3
Link: +3000DP
Link: [When Linking] You may link 1 non-white level 4 or lower [System] or [Seven Code] trait card from your trash to this Digimon without paying the cost.Lv.3 コピペモン BT26-084 C 並/アプモン | システム | コピペ/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) 【自分のターン】[ターン1回]このデジモンがリンクしたとき、自分のデッキの上から3枚オープンする。その中の特徴「セブンコード」を持つカード1枚を支払うコスト-3で登場/使用できる。残りはデッキの上か下だけに戻す。 --- 〈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: 【リンク時】自分のトラッシュから、白以外の特徴「システム」/「セブンコード」を持つLv.4以下のカード1枚をこのデジモンにコストを支払わずリンクできる。