Q1: If my opponent has BT9-047 Pomumon or BT9-033 Pillomon in play. If I target that Digimon with the -6000 DP effect of this card. Can I still play a Digimon?
No, even though it will have 0 DP the Digimon will not be deleted until the effect of Flame Hellscythe is over. As such, you cannot play a Digimon via the effect of Flame Hellscythe. (Rules Processing)
Flame Hellscythe BT8-109 R [Main] 1 of your opponent's Digimon gets -6000 DP for the turn. Then, you may play 1 purple or yellow Digimon card with 6000 DP or less from your trash without paying its memory cost. --- [Security] Activate this card's [Main] effect.
Flame Hellscythe BT8-109 R [Main] 1 of your opponent's Digimon gets -6000 DP for the turn. Then, play 1 purple or yellow Digimon card with 6000 DP or less from your trash without paying its memory cost. --- [Security] Activate this card's [Main] effect.
Flame Hellscythe BT8-109 R [Main] 1 of your opponent's Digimon gets -6000 DP for the turn. Then, you may play 1 {{Colour|purple}} or {{Colour|yellow}} Digimon card with 6000 DP or less from your trash without paying its memory cost. ---
フレイムヘルサイズ BT8-109 R 【メイン】このターンの間、相手のデジモン1体をDP-6000。その後、自分のトラッシュから、紫か黄のDP6000以下のデジモンカード1枚をコストを支払わずに登場できる。 --- 【セキュリティ】このカードの【メイン】効果を発揮する。