Q1: Does this card's All Turns effect also prevent Main effects from activating if they have multiple activation timings such as On Play Main?
No, they can activate. This card's All Turns effect only prevents effects from activating at the On Play timing. Effects can still activate at the Main timing.
Menoa Bellucci BT17-092 U [On Play] By trashing 1 [Morphomon] or [Eosmon] in your hand, <Draw 2>. [All Turns] While you have [Eosmon], none of your opponent's Tamers' [On Play] effects activate. [Opponent's Turn] [Once Per Turn] When one of your [Eosmon] would leave the battle area by an opponent's effect, by deleting 1 of your other [Eosmon], prevent it from leaving. --- [Security] Play this card without paying the cost.
Menoa Bellucci BT17-092 U [On Play] By trashing 1 [Morphomon] or [Eosmon] in your hand, <Draw 2>. [All Turns] While you have [Eosmon], none of your opponent's Tamers' [On Play] effects activate. [Opponent's Turn] [Once Per Turn] When one of your [Eosmon] would leave the battle area by an opponent's effect, by deleting 1 of your other [Eosmon], prevent it from leaving. --- [Security] Play this card without paying the cost.
Menoa Bellucci BT17-092 U [On Play] By trashing 1 [Morphomon] or [Eosmon] in your hand, <Draw 2>. [All Turns] While you have [Eosmon], all of your opponent's Tamers [On Play] effects don't activate. [Opponent's Turn] [Once Per Turn] When one of your [Eosmon] would leave the battle area by an opponent's effect, by deleting 1 of your other [Eosmon], prevent it. --- [Security] Play this card without paying the cost.
メノア• ベルッチ BT17-092 U 【登場時】自分の手札から、「モルフォモン」/「エオスモン」1枚を破棄することで、≪2ドロー≫。 【お互いのターン】自分の「エオスモン」がいる間、相手のテイマー全ての【登場時】効果は発揮しない。 【相手のターン】[ターンに1回]自分の「エオスモン」が相手の効果でバトルエリアを離れるとき、他の自分の「エオスモン」1体を消滅させることで、離れない。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。