5 official rulings from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

I have this Digimon in play when one of my other Digimon attacks, deletes an opponent's Digimon, and is deleted in return. Do I gain two memory?
Yes, both you and your opponent's Digimon were deleted, so you gain two memory.
Ruled Mar 28, 2024
Do I gain 1 memory from this Digimon's effect when a Security Digimon is deleted?
No, Security Digimon aren't considered to be Digimon, so you don't gain any memory.
Ruled Mar 28, 2024
When I had this Digimon, another of my Digimon attacked, and both my Digimon and my opponent's Digimon were deleted in the battle. Do I gain 2 memory at such times?
Yes, the +1 memory effect activates twice, earning you two memory.
Ruled Mar 28, 2024
My opponent and I both have this Digimon in play. If another Digimon is deleted, what happens?
The effects trigger simultaneously, so the turn player gains a memory first, followed by the non-turn player gaining a memory, returning the memory gauge to its original position.
Ruled Mar 28, 2024
If this Digimon attacks an opponent's Digimon and both Digimon end up being deleted, can I gain a memory off this card's effect?
No. This Digimon was deleted, so the <All Turns> effect doesn't activate.
Ruled Mar 28, 2024
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Questions and answers are Bandai's official rulings, collected and translated by the DigimonCardGame Wiki community and reused here under CC BY-SA. Card names and card text are © their respective publishers; Combalo is not affiliated with Bandai.