Do you treat the special digivolution requirements of "", written in the text for [BT8-051 Digmon], as an effect? Can [BT8-051 Digmon] digivolve from [Armadillomon] in the breeding area?
Yes, [BT8-051 Digmon] can digivolve from [Armadillomon] in the breeding area. Special digivolutions are a digivolution requirements with reference to special conditions, not effects. Therefore, special digivolution conditions can be fulfilled even in the breeding area. (From Card Rulings:BT8-012)