Rulings
Q1: How can I digivolve into this card?
You can digivolve into this card from a red or blue level 6 Digimon by paying its digivolve cost.
Q2: I use this card's When Digivolving effect to choose one of my opponent's Digimon. Is that Digimon deleted?
Yes. The chosen Digimon and all Digimon with the same name as that Digimon are deleted.
Q3: I choose Greymon with this card's When Digivolving effect while my opponent has a Greymon, MetalGreymon, and WarGreymon in play. Are all of them deleted, or just Greymon?
Just Greymon. Only Digimon with names that completely match the specified name are deleted.
Q4: My opponent has ST1-09 MetalGreymon, BT1-021 MetalGreymon, and BT1-114 MetalGreymon in play in their battle area. I use this card's When Digivolving effect to choose ST1-09 MetalGreymon. Are all of my opponent's MetalGreymon cards deleted?
Yes. The card numbers may be different, but the names match. All of your opponent's MetalGreymon cards are deleted.
Q5: If I attack with this Digimon when it has a level 6 Digimon card in its digivolution cards, do I always have to activate this card's When Attacking effect?
No, you can choose not to.
Q6: Can I use this card's When Attacking effect to return a level 6 digivolution card to my hand but choose to not unsuspend this card?
No, you can't.
Data Sources
Lv.7 Omnimon BT1-084 SR Mega | Vaccine | Holy Warrior/Royal Knight [When Digivolving] Choose 1 of your opponent's Digimon. Delete all of your opponent's Digimon that share a name with it.[When Attacking] You can unsuspend this Digimon by returning 1 of this Digimon's level 6 digivolution cards to your hand.
Lv.7 Omnimon BT1-084 SR Mega | Vaccine | Holy Warrior/Royal Knight [When Digivolving] Choose 1 of your opponent's Digimon. Delete all of your opponent's Digimon that share a name with it.[When Attacking] You can return one of this Digimon's level 6 digivolution cards to your hand to unsuspend this Digimon.
Lv.7 Omnimon BT1-084 SR mega | Vaccine | Holy Warrior/Royal Knight [When Digivolving] Choose 1 of your opponent's Digimon. Delete all of your opponent's Digimon that share a name with it. [When Attacking] You can unsuspend this Digimon by returning 1 of this Digimon's level 6 digivolution cards to your hand.
Lv.7 オメガモン BT1-084 SR 究極体 | ワクチン種 | 聖騎士型/ロイヤルナイツ 【進化時】相手のデジモン1体を選ぶ。そのデジモンと同じ名称の相手のデジモン全てを消滅させる。【アタック時】このデジモンの進化元のLv.6のデジモンカード1枚を手札に戻すことで、このデジモンをアクティブにする。