

Q1: A Digimon with this card in its digivolution cards attacks, and another effect trashes a card from my hand. At such times, if I activate this card's inherited effect and perform a digivolution into P-209 Titamon, can I then activate P-209 Titamon's Alliance?
No, you can't. Alliance is an effect that triggers upon an attack. You can't activate it if the Digimon doesn't have Alliance upon the attack declaration.
Lv.3 Shamanmon BT24-009 C Rookie | Virus | Demon/Titan/TS [On Play] By trashing 1 card with the [Demon], [Shaman] or [Titan] trait from your hand, <Draw 2>. --- [Your Turn] [Once Per Turn] When your hand is trashed from, this [Demon] or [Titan] trait Digimon may digivolve into [Titamon] or a [Titan] trait Digimon card in the trash with the digivolution cost reduced by 1.
Lv.3 Shamanmon BT24-009 C Rookie | Virus | Demon/Titan/TS [Digivolve] [Tsunomon]/Lv.2 w/[TS] trait: Cost 0 [On Play] By trashing 1 card with the [Demon], [Shaman] or [Titan] trait from your hand, <Draw 2>. --- [Your Turn] [Once Per Turn] When your hand is trashed from, this [Demon] or [Titan] trait Digimon may digivolve into [Titamon] or a [Titan] trait Digimon card in the trash with the digivolution cost reduced by 1.
Lv.3 Shamanmon BT24-009 C rookie | Virus | Demon/Titan/TS [Digivolve] [Tsunomon] or Lv.2 w/[TS] trait: Cost 0 [On Play] By trashing 1 card with the [Demon], [Shaman] or [Titan] trait from your hand, <Draw 2>. --- [Your Turn] [Once Per Turn] When your hand is trashed from, this [Demon] or [Titan] trait Digimon may digivolve into [Titamon] or a [Titan] trait Digimon card in the trash with the digivolution cost reduced by 1.
Lv.3 シャーマモン BT24-009 C 成長期 | ウィルス種 | 鬼人型/タイタン族/TS 【登場時】自分の手札から、特徴に「鬼人型」/「神人型」/「タイタン族」を持つカード1枚を破棄することで、≪2ドロー≫。 --- 【自分のターン】[ターンに1回]自分の手札が破棄されたとき、特徴に「鬼人型」/「タイタン族」を持つこのデジモンをトラッシュの「タイタモン」か特徴に「タイタン族」を持つデジモンカードに支払う進化コスト-1で進化できる。