Rulings
Q1: When this card appears, I made my "BT18-015 Kimeramon" disappear and this card appeared. In this case, are the On Play When Digivolving effect of this card and the On Deletion effect of "BT18-015 Kimeramon" triggered at the same time?
Yes, it is triggered simultaneously. However, if On Deletion of "BT18-015 Chimeramon" is triggered first, and this card and "Chimeramon" whose On Play and When Digivolving effect is triggered jogles to "Millenniummon", the On Play effect cannot be triggered because this card leaves the Battle Area before the effect is triggered. The At Appearance effect cannot be demonstrated because the card will leave the battle area before it can be demonstrated.
Q2: When this card's On Deletion effect digivolves Joggles to "Millenniummon" in my hand, does it have to meet the "Millenniummon" Joggles' digivolution requirements?
Yes, DNA digivolution requirements must be met. Also, "Millenniummon" without DNA digivolution cannot have DNA digivolution.
Q3: Can the On Deletion effect of this card On Deletion digivolve DNA digivolved to "Millenniummon" in my hand with my "Kimeramon" and "BT18-073 Mugendramon" itself in the trash that activated this effect?
Yes, it is possible. Since the On Deletion effect is activated after the card is placed in Trash, this card in Trash itself can DNA digivolves to "Millenniummon" in your hand.
Data Sources
Lv.6 Machinedramon BT18-073 R Mega | Virus | Machine [Digivolve] Lv.5 w/[Composite] trait: Cost 3 When this card would be played, by deleting 1 of your Digimon with the [Composite] trait, reduce the play cost by 4. [On Play] [When Digivolving] <De-Digivolve 1> all of your opponent's Digimon. [On Deletion] 1 of your [Kimeramon] and 1 [Machinedramon] in the trash may DNA digivolve into [Millenniummon] in the hand. (Rule) Trait: Has [Composite] Type. --- Inherited: [Opponent's Turn] [Once Per Turn] When any of your opponent's Digimon attack, you may change the attack target to 1 of your Digimon with the [Composite] or [Wicked God] trait.
Lv.6 Machinedramon BT18-073 R Mega | Virus | Machine [Digivolve] Lv.5 w/[Composite] trait: Cost 3 When this card would be played, by deleting 1 of your Digimon with the [Composite] trait, reduce the play cost by 4. [On Play] [When Digivolving] <De-Digivolve 1> all of your opponent's Digimon. [On Deletion] 1 of your [Kimeramon] and 1 [Machinedramon] in the trash may DNA digivolve into [Millenniummon] in the hand. (Rule) Trait: Has [Composite] Type. --- Inherited: [Opponent's Turn] [Once Per Turn] When any of your opponent's Digimon attack, you may change the attack target to 1 of your Digimon with the [Composite] or [Wicked God] trait.
Lv.6 Machinedramon BT18-073 R Mega | Virus | Machine [Digivolve] Lv.5 w/[Composite] trait: Cost 3 When you would play this card, by deleting 1 of your Digimon with the [Composite] trait, reduce the play cost by 4. [On Play] [When Digivolving] <De-Digivolve 1> all of your opponent's Digimon. [On Deletion] You may DNA digivolve 1 of your [Kimeramon] in play and 1 [Machinedramon] in the trash into [Millenniummon] in the hand. (Rule) Trait: Has [Composite] type. --- Inherited: [Opponent's Turn] [Once Per Turn] When any of your opponent's Digimon attack, you may change the attack target to 1 of your Digimon with the [Composite] or [Wicked God] trait.
Lv.6 ムゲンドラモン BT18-073 R 究極体 | ウィルス種 | マシーン型 特徴に「合成型」を持つLv.5:コスト3 このカードが登場するとき、特徴に「合成型」を持つ自分のデジモン1体を消滅させることで、支払う登場コスト-4。 【登場時】【進化時】相手のデジモン全てを≪退化1≫。 【消滅時】自分の「キメラモン」1体とトラッシュの「ムゲンドラモン」1枚で手札の「ミレニアモン」にジョグレス進化できる。 〈ルール〉特徴:タイプ「合成型」を持つ。 --- Inherited: 【相手のターン】[ターンに1回]相手のデジモンがアタックしたとき、アタックの対象を特徴に「合成型」/「邪神型」を持つ自分のデジモン1体に変更できる。