Q1: Can I choose either my Digimon or an opponent's Digimon for this card's When Digivolving When Attacking effect?
Yes, you can choose either your Digimon or an opponent's Digimon.
Q2: Does this card's Your Turn effect give it the Three Musketeers trait when it's in the breeding area?
No, it doesn't gain the Three Musketeers trait. Only effects with the Breeding icon trigger and activate in the breeding area.
Lv.4 Deputymon EX7-010 R Champion | Vaccine | Mutant [Digivolve] Lv.3 w/[Three Musketeers] in text: Cost 2 [When Digivolving] [When Attacking] [Once Per Turn] You may trash any 1 Option card from 1 Digimon's digivolution cards. [Your Turn] This Digimon gains the [Three Musketeers] trait. --- Inherited: [Your Turn] This Digimon gets +2000 DP.
Lv.4 Deputymon EX7-010 R Champion | Vaccine | Mutant [Digivolve] Lv.3 w/[Three Musketeers] in text: Cost 2 [When Digivolving] [When Attacking] [Once Per Turn] You may trash any 1 Option card from 1 Digimon's digivolution cards. [Your Turn] This Digimon gains the [Three Musketeers] trait. --- Inherited: [Your Turn] This Digimon gets +2000 DP.
Lv.4 Deputymon EX7-010 R Champion | Vaccine | Mutant [Digivolve] Lv.3 w/[Three Musketeers] in text: Cost 2 [When Digivolving] [When Attacking] You may trash any 1 Option card from 1 Digimon's digivolution cards. [Your Turn] This Digimon gains the [Three Musketeers] trait. --- Inherited: [Your Turn] This Digimon gets +2000 DP.
Lv.4 リボルモン EX7-010 R 成熟期 | ワクチン種 | 突然変異型 「三銃士」の記述があるLv.3:コスト2 【進化時】【アタック時】[ターンに1回]デジモン1体の進化元から、オプションカード1枚を選んで破棄できる。 【自分のターン】このデジモンは特徴:「三銃士」を得る。 --- Inherited: 【自分のターン】このデジモンをDP+2000。