Q1: I activated the Your Turn {{OncePerTurn}} on [[P-117|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|P-117 Veemon]]'s Your Turn {{OncePerTurn}} 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. --- [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. --- [Security] Play this card without paying the cost.
Davis Motomiya BT21-085 SR Hero {{StartYourMain|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. ---