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

Does this card's "This card in your hand can digivolve onto one of your [Gammamon] that has a digivolution card with [Gammamon] for a digivolution cost of 3, ignoring this card's digivolution requirements" mean that it can also digivolve from cards that have [Gammamon] such as [BetelGammamon], [KausGammamon], [WezenGammamon], or [GulusGammamon]?
No, it can't. This effect can only be used to digivolve from a Digimon whose card name is [Gammamon] and also has a digivolution card with [Gammamon]. Note that digivolutions from cards with non-[Gammamon] card names are possible using digivolution requirements or this card's special digivolution requirements.
Ruled Mar 28, 2024
When digivolving into this card, do the <When Digivolving> effects on digivolution cards with [Gammamon] activate?
Yes, they activate. This card's ""This Digimon gains all effects of cards with [Gammamon] in this Digimon's digivolution cards"" effect is an <All Turns> effect, so it will activate as soon as the digivolution is confirmed. Therefore, <When Digivolving> effects are gained and will trigger.
Ruled Mar 28, 2024
I digivolve a Digimon with [Gammamon] and a <When Digivolving> <Blitz> effect into this card. Can I activate the <When Digivolving> <Blitz> effect through this card's <All Turns> effect and attack?
Yes, if the memory gauge is now at 1 or greater on your opponent's side, you can activate <Blitz> .
Ruled Mar 28, 2024
Can I digivolve one of my [Gammamon] with a digivolution card with [Gammamon] in the battle area into this card in the hand when an effect to digivolve one of my Digimon is activated?
Yes, you can.
Ruled Mar 28, 2024
Does this card's <All Turns> effect and inherited effect allow me to activate the inherited effect of a digivolution card with [Gammamon] as an effect of this card?
No, this card's <All Turns> effect and inherited effect don't affect the inherited effects of digivolution cards with [Gammamon].
Ruled Mar 28, 2024
Got a line that uses Canoweissmon? Map it in the builder and share it with a link.
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.