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

Does this card's "[Takuya Kanbara]: Cost 2" digivolution requirement mean that [Takuya Kanbara] is treated as a Digimon when it digivolves?
No, [Takuya Kanbara] digivolves as a Tamer.
Ruled Sep 6, 2024
If I use this card's "[Takuya Kanbara]: Cost 2" digivolution requirement to digivolve, do "when a Digimon digivolves" effects trigger?
No, they don’t trigger. "When a Digimon digivolves" effects don't trigger when a Tamer digivolves.
Ruled Sep 6, 2024
If I use this card's "[Takuya Kanbara]: Cost 2" digivolution requirement to digivolve, do "when a Digimon would digivolve" effects trigger?
No, they don’t trigger. "When a Digimon digivolves" effects don't trigger when a Tamer digivolves.
Ruled Sep 6, 2024
My opponent activates EX3-053 [Metallicdramon]'s <On Play> effect. Can I digivolve an unsuspended [Takuya Kanbara] using this card's "[Takuya Kanbara]: Cost 2" digivolution requirement in the next turn?
Yes, you can. Because you're digivolving from a Tamer, it isn't considered an unsuspended Digimon.
Ruled Sep 6, 2024
Can I activate P-103 [Offense Training]'s <Delay> effect and digivolve using this card's "[Takuya Kanbara]: Cost 2" digivolution requirement to digivolve?
No, you can't. P-103 [Offense Training]'s <Delay> effect digivolves 1 Digimon. It doesn't digivolve Tamers.
Ruled Sep 6, 2024
If I use this Digimon's <When Digivolving> effect to digivolve into [AncientGreymon], then it digivolves or is affected by <De Digivolve>, what happens to the "delete this Digimon at the end of this turn" effect?
Digimon carry over effects after digivolving or de-digivolving, therefore it's deleted at the end of the turn.
Ruled Sep 6, 2024
This Digimon has a Tamer card in its digivolution cards, and I used its <When Digivolving> effect to digivolve into [AncientGreymon], then it was affected by a <De Digivolve> effect and became a Tamer. Does the "delete this Digimon at the end of this turn" effect delete this Tamer at such times?
No, it isn't deleted because it's no longer considered a Digimon.
Ruled Sep 6, 2024
I used BT3-109 [Back for Revenge!] on this Digimon, then I used this Digimon's <When Digivolving> effect to digivolve into [AncientGreymon]. After this Digimon is deleted at the end of this turn, does BT3-109 [Back for Revenge!]'s effect play this card or [AncientGreymon] into the battle area?
Digimon carry over effects after digivolving, therefore it plays [AncientGreymon].
Ruled Sep 6, 2024
I have a situation where I have my "BT17-012 BurningGreymon" with "BT18-088 Takuya Kanbara & Koji Minamoto" as its digivolution card. At the End of Turn, "BT17-012 Vritramon" attacked by the digivolving source effect of "BT18-088 Takuya Kanbara & Koji Minamoto", and "BT17-012 Vritramon" digivolved to this card by its [When Attacking] effect. At this time, if this card's [When Digivolving] effect evolved into "AncientGreymon", will that "AncientGreymon" be deleted by this card's effect, even though the timing when the turn ended has already passed?
No, it is not deleted. Effects that are processed when a specific timing is reached are processed as triggered when the timing is reached. If the Digivolved by this card's effect at the end of the turn, the "Delete this Digimon at the end of this turn" of this card is not processed because the timing to be at the end of the turn has passed.
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.