Alphamon

Q:If I use this card's [On Play] [When Digivolving] effect to digivolve a Digimon in the breeding area, does that Digimon's [When Digivolving] effect trigger?

A:No, it doesn’t trigger.

Q:What order do a [Security] effect, "when [...] performs a security check" effect, and "when a card is removed from [...] security stack" effect activate when they trigger simultaneously upon a security check?

A:[Security] effects take precedence for activation. Upon a security check, a [Security] effect will immediately activate without pending activation. For other triggered effects, the turn player activates their effects first.

Q:If an opponent's Digimon is attacking and another effect digivolves one of my Digimon into this card, does that meet the "if during an attack" condition in this card's [On Play] [When Digivolving] effect?

A:Yes, it does.