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

Does this card’s inherited effect reduce the digivolution costs of my other Digimon, or just the Digimon that has this card in its digivolution cards?
When any one of your Digimon digivolves, as long as it meets the requirements, the memory cost of the digivolution is reduced by 1.
Ruled Mar 28, 2024
I activate this card’s inherited effect, then digivolve into a Digimon without [Insectoid] or [Ancient Insect] in its traits. Does this waste the inherited effect?
No. As long as it’s the same turn, the effect will persist until you digivolve into a Digimon card with [Insectoid] or [Ancient Insect] in its traits.
Ruled Mar 28, 2024
If a Digimon with this card in its digivolution cards somehow attacks 2 or more times in the same turn, does the -1 digivolution cost reduction stack?
Yes. Reduce the digivolution cost by 1 for each time that Digimon attacked during the same turn. However, once you digivolve into a Digimon card that has [Insectoid] or [Ancient Insect] in its traits, the accumulated digivolution cost reductions from this effect will be reset.
Ruled Mar 28, 2024
Can I reduce the memory cost of digivolutions in my breeding area with this card's inherited effect?
No, you can't reduce the memory cost of digivolutions performed in your breeding area with this card's inherited effect.
Ruled Mar 28, 2024
If I digivolve a Digimon with [Insectoid] or [Ancient Insect] in my battle area into another Digimon, does this card’s inherited effect reduce the memory cost of that digivolution by 1?
No, it only reduces the memory cost by 1 when digivolving one of your Digimon into a Digimon card in your hand with [Insectoid] or [Ancient Insect].
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.