10 official rulings from Bandai, last ruled Sep 20, 2024. Straight answers to how this card actually resolves.

How does this card’s effect work, exactly?
This effect prevents all players from digivolving with effects that say "ignoring digivolution requirements" or otherwise digivolving from Digimon without meeting digivolution requirements.
Ruled Mar 28, 2024
Does this card's effect also prevent the effects on [Hybrid] cards like "You may digivolve this card from your hand onto one of your red Tamers as if the Tamer is a level 3 red Digimon"?
No. Those effects don't mention “ignoring digivolution requirements,” and require you to follow the specified digivolution requirements when digivolving a Tamer as if they were a Digimon.
Ruled Mar 28, 2024
Does this card’s effect prevent DNA and special digivolutions?
No. DNA and special digivolutions are treated as a card’s digivolution requirements, so you can still perform both as normal.
Ruled Mar 28, 2024
If this Digimon is in play, can I activate an effect that reads, “you may digivolve...without paying its memory cost”?
Yes. The effect doesn't ignore digivolution requirements―it just lets you skip paying the memory cost―so you can activate it as normal.
Ruled Mar 28, 2024
What is the effect of "neither party can ignore digivolution requirements?"
This effect prevents digivolves from ignoring digivolution requirements. This effect affects both players.
Ruled Sep 20, 2024
Can I DNA digivolve or burst digivolve while the "neither of us can ignore the digivolution requirements" effect is active?
Yes, it can be DNA digivolves or burst digivolutions.
Ruled Sep 20, 2024
Can I digivolve without paying the cost while the "each other can't ignore digivolution requirements" effect is active?
Yes, it can digivolve. If you digivolve without paying the cost, you are not ignoring the digivolution requirements.
Ruled Sep 20, 2024
While the "Mutual cannot ignore digivolution requirements" effect is activated, can I ignore some of the digivolution requirements, such as the "Ignore Lv.
No, you cannot ignore any part of the digivolution requirements to digivolve.
Ruled Sep 20, 2024
Can I use the [When Attacking] effect of "BT10-067 Justimon: Critical Arm" to digivolve it while the "Mutually cannot ignore digivolution requirements" effect is activated?
No, it cannot digivolve.
Ruled Sep 20, 2024
Can I use the first effect of BT4-011 Agunimon to digivolve from tamers while the "Mutually cannot ignore digivolution requirements" effect is activated?
Yes, it can digivolve. The effect of digivolving a card with additional information is not an effect that ignores the digivolution requirements.
Ruled Sep 20, 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.