Q1: I activated the Your Turn Once Per Turn on P-117 Veemon when digivolving it and reduced the digivolution cost by 1. If I then activate this card's Main effect and trash a card stacked with that Digimon, can I activate P-117 Veemon's Your Turn Once Per Turn effect again?
No, you can't activate it. Even if a stacked card is trashed, the X Per Turn limit has already been reached for the activated effect.
Davis Motomiya BT21-085 SR Hero [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Main] By suspending this Tamer and trashing the top stacked card of 1 of your [Armor Form] trait Digimon, <Draw 1> and gain 1 memory. --- Inherited: -
Davis Motomiya BT21-085 SR Hero [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Main] By suspending this Tamer and trashing the top stacked card of 1 of your [Armor Form] trait Digimon, <Draw 1> and gain 1 memory. --- Inherited: [Security] Play this card without paying the cost.
Davis Motomiya BT21-085 SR / | Hero [Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Main] By suspending this Tamer and trashing the top stacked card of 1 of your [Armor Form] trait Digimon, <Draw 1>. and gain 1 memory.
本宮大輔 BT21-085 SR ヒーロー 【自分のメインフェイズ開始時】相手のデジモンがいるなら、メモリー+1。 【メイン】このテイマーをレストさせ、特徴に「アーマー体」を持つ自分のデジモン1体に重ねられているカードを上から1枚破棄することで、≪1ドロー≫し、メモリー+1。 --- 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。