

Q1: What does this card's "(Rule) Name: Also treated as Numemon" mean, exactly?
This is a special rule for this card that treats it as a card that has the Numemon name. This is a rule and not an effect, therefore this card is treated as having the Numemon name when the card is in your hand, breeding area, or any other area.
Lv.4 Geremon BT15-035 C Champion | Virus | Mollusk [On Play] [On Deletion] By trashing 1 card with [Numemon] or [Sukamon] in its name in your hand, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. (Rule) Name: Also treated as [Numemon]. --- [When Attacking] 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn.
Lv.4 Geremon BT15-035 C Champion | Virus | Mollusk [On Play] [On Deletion] By trashing 1 card with [Numemon] or [Sukamon] in its name in your hand, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. (Rule) Name: Also treated as [Numemon]. --- [When Attacking] 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn.
Lv.4 Geremon BT15-035 C champion | Virus | Mollusk [On Play] [On Deletion] By trashing 1 card with [Numemon] or [Sukamon] in its name in your hand, 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn. (Rule) Name: Also treated as [Numemon]. --- [When Attacking] 1 of your opponent's Digimon gains <Security A. -1> until the end of their turn.
Lv.4 ゲレモン BT15-035 C 成熟期 | ウィルス種 | 軟体型 【登場時】【消滅時】自分の手札から、名称に「ヌメモン」/「スカモン」を含むカード1枚を破棄することで、相手のターン終了まで、相手のデジモン1体に≪Sアタック-1≫を与える。 〈ルール〉名称:「ヌメモン」としても扱う。 --- 【アタック時】相手のターン終了まで、相手のデジモン1体に≪Sアタック-1≫を与える。