Q1: Does this card's Start of Your Main Phase effect activate if there are 2 or more Digimon in the battle areas including my opponent's Digimon, rather than just my Digimon?
Yes. If you and your opponent have a total of 2 or more Digimon in play, the effect activates.
Q2: If I have multiple Tamers with cards under them, can I use this card's All Turns effect to perform a DigiXros for each of my Tamers using a card from under each one?
No, you can't. Even if you have multiple Tamers with cards under them, you can only use 1 card from under 1 of them when you choose cards for a DigiXros.
Q3: What does this card's (Rule) mean, exactly? (*This card's "The name of this card/Tamer is also treated as Kiriha Aonuma/Nene Amano" has been changed to "(Rule) Name: Also treated as Kiriha Aonuma and Nene Amano.")
This is a special rule for this card that always treats it as if it also has the Kiriha Aonuma and Nene Amano names.
Kiriha Aonuma & Nene Amano EX4-062 R Blue Flare/Twilight The name of this card/Tamer is also treated as [Kiriha Aonuma]/[Nene Amano]. [Start of Your Main Phase] If there are 2 or more Digimon in play, gain 1 memory. [All Turns] When you would play 1 Digimon card with the [Blue Flare] or [Twilight] trait with DigiXros requirements, by suspending this Tamer, you may place 1 card from under your Tamers and 1 card from your trash as digivolution cards for a DigiXros. --- Inherited: -
Kiriha Aonuma & Nene Amano EX4-062 R Blue Flare/Twilight The name of this card/Tamer is also treated as [Kiriha Aonuma]/[Nene Amano]. [Start of Your Main Phase] If there are 2 or more Digimon in play, gain 1 memory. [All Turns] When you would play 1 Digimon card with the [Blue Flare] or [Twilight] trait with DigiXros requirements, by suspending this Tamer, you may place 1 card from under your Tamers and 1 card from your trash as digivolution cards for a DigiXros. --- Inherited: [Security] Play this card without paying the cost.
Kiriha Aonuma & Nene Amano EX4-062 R Blue Flare/Twilight [Start of Your Main Phase] If there are 2 or more Digimon in play, gain 1 memory. [All Turns] When you would play 1 Digimon card with the [Blue Flare] trait or [Twilight] trait with DigiXros requirements, by suspending this Tamer, you may place 1 card from under your Tamers and 1 card from your trash as digivolution cards for a DigiXros.
蒼沼キリハ&天野ネネ EX4-062 R ブルーフレア/トワイライト このカード/テイマーの名称は「蒼沼キリハ」/「天野ネネ」としても扱う。 【自分のメインフェイズ開始時】デジモンが2体以上いるなら、メモリー+1。 【お互いのターン】特徴に「ブルーフレア」か「トワイライト」を持ち、デジクロス条件を持つ自分のデジモンカード1枚を登場させるとき、このテイマーをレストさせることで、自分のテイマーの下と自分のトラッシュのカード1枚ずつもデジクロスで進化元に置ける。 --- Inherited: 【セキュリティ】このカードをコストを支払わずに登場させる。