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

I have this Digimon and a [Diaboromon] Token in my battle area. My opponent attacks with a Digimon, and deletes this Digimon with a <When Attacking> effect. Can I block the attack with my [Diaboromon] Token?
No. If your [Diaboromon] was deleted by a <When Attacking> effect, your [Diaboromon] Token will have already lost <Blocker> by the time you reach blocker timing.
Ruled Mar 28, 2024
Can I play a Token with this card’s <Security> effect at the end of the battle even if this card loses the battle against the attacking Digimon?
Yes. The <Security> effect activates as soon as the card is flipped during the security check, which means you can play the Token regardless of the battle's outcome.
Ruled Mar 28, 2024
This card is flipped over during a security check, but the attacking Digimon still has security checks remaining. Is the Token played off this Digimon’s <Security> effect first, or do I have to wait until my opponent finishes the rest of their security checks?
The Token is played first. Once all <Security> effects and effects triggered by battle have been activated, proceed to the next security check.
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.