Q1: Can the On Play effect of this card specify a Digimon of a different opponent than the Digimon specified by the "Rest" effect by the "Inactive" effect?
Yes, it is possible.
Lv.5 Parrotmon ST18-11 U Ultimate | Giant Bird [On Play] Suspend 1 of your opponent's Digimon. Then, 1 of their Digimon can't unsuspend until the end of their turn. --- Inherited: <Piercing> (When this Digimon attacks and deletes your opponent's Digimon in battle, it checks security before the attack ends.)
Lv.5 Parrotmon ST18-11 U Ultimate | Vaccine | Giant Bird [On Play] Suspend 1 of your opponent's Digimon. Then, 1 of their Digimon can't unsuspend until the end of their turn. --- Inherited: <Piercing> (When this Digimon attacks and deletes your opponent's Digimon in battle, it checks security before the attack ends.)
Lv.5 Parrotmon ST18-11 U Ultimate | Vaccine | Giant Bird [On Play] Suspend 1 of your opponent's Digimon. Then, 1 of your opponent's Digimon can't unsuspend until the end of their turn. --- Inherited: <Piercing> (When this Digimon attacks and deletes an opponent's Digimon, it performs any security checks it normally would.)
Lv.5 パロットモン ST18-11 U 完全体 | ワクチン種 | 巨鳥型 【登場時】相手のデジモン1体をレストさせる。その後、相手のターン終了まで、相手のデジモン1体はアクティブにならない。 --- Inherited: ≪貫通≫(このデジモンがアタックしたバトルで相手のデジモンを消滅させたとき、アタック終了前にチェックする)