Rulings
Q1: Can I use this card's All Turns effect to suspend this Tamer when my level 5 or higher Free trait Digimon would be deleted in battle, even if I don't have any level 4 or lower Digimon cards in that Digimon's digivolution cards?
Yes, you can. Even if the part after the conditions specified with "by X" in an effect can't be resolved, the effect can still activate.
Q2: When my level 5 or higher Free trait Digimon would be deleted in battle, I used this card's All Turns effect to play a level 4 or lower Digimon card with Retaliation in its inherited effects from that Digimon's digivolution cards. Can I use Retaliation to delete the battled opponent's Digimon at such times?
No, you can't. The card is removed from digivolution cards before Retaliation can activate.
Q3: Can I use this card's End of Your Turn effect to attack even when the Free trait Digimon is suspended?
No, you can't. This card's End of Your Turn effect does not allow you to attack with Digimon that are in a state where they can't attack.
Q4: When I have 2 copies of this Tamer and 2 unsuspended Free trait Digimon, can I activate the End of Your Turn effect on both copies of this card and attack using both of the Free trait Digimon?
No, you can't. The effect will trigger on both copies, but after the attack declaration is made for the 1st Digimon and effects such as When Attacking effects have finished activating, the effect on the 2nd copy of this card that was pending activation will activate before the counter timing. However, a new attack declaration can't be made during an attack, and only the 1st Digimon's attack can be performed as a result.
Data Sources
Davis Motomiya & Ken Ichijoji BT17-084 R [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When one of your level 5 or higher [Free] trait Digimon would be deleted in battle, by suspending this Tamer, you may play 1 level 4 or lower Digimon card from that Digimon's digivolution cards without paying the cost. [End of Your Turn] 1 of your [Free] trait Digimon may attack an opponent's Digimon. --- [Security] Play this card without paying the cost.
Davis Motomiya & Ken Ichijoji BT17-084 R [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When one of your level 5 or higher [Free] trait Digimon would be deleted in battle, by suspending this Tamer, you may play 1 level 4 or lower Digimon card from that Digimon's digivolution cards without paying the cost. [End of Your Turn] 1 of your [Free] trait Digimon may attack an opponent's Digimon. --- [Security] Play this card without paying the cost.
Davis Motomiya & Ken Ichijoji BT17-084 R [Start of Your Turn] If you have 2 or less memory, set it to 3. [All Turns] When one of your level 5 or higher Digimon with the [Free] trait would be deleted in battle, by suspending this Tamer, you may play 1 level 4 or lower Digimon card from that Digimon's digivolution cards without paying the cost. [End of Your Turn] 1 of your Digimon with the [Free] trait may attack an opponent's Digimon. --- [Security] Play this card without paying the cost.
本宮大輔&一乗寺賢 BT17-084 R 【自分のターン開始時】メモリーが2以下なら、3にする。 【お互いのターン】特徴に「フリー」を持つLv.5以上の自分のデジモンがバトルで消滅するとき、このテイマーをレストさせることで、そのデジモンの進化元から、Lv.4以下のデジモンカード1枚をコストを支払わずに登場できる。 【自分のターン終了時】特徴に「フリー」を持つ自分のデジモン1体で相手のデジモンにアタックできる。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。