

Q1: If this Digimon's DP is increased/reduced by another effect, does this card's On PlayWhen Digivolving effect target my opponent’s Digimon with DP less than or equal to this Digimon’s DP after it's increased/reduced?
Yes, that's correct.
Lv.5 Garudamon EX5-039 U Ultimate | Vaccine | Birdkin <Fortitude> (When this Digimon with digivolution cards is deleted, play this card without paying the cost) [On Play] [When Digivolving] Suspend 1 of your opponent's Digimon with DP less than or equal to this Digimon's DP. --- [All Turns] While this Digimon is suspended, it gets +1000 DP.
Lv.5 Garudamon EX5-039 U Ultimate | Vaccine | Birdkin <Fortitude> (When this Digimon with digivolution cards is deleted, play this card without paying the cost) [On Play] [When Digivolving] Suspend 1 of your opponent's Digimon with DP less than or equal to this Digimon's DP. --- [All Turns] While this Digimon is suspended, it gets +1000 DP.
Lv.5 Garudamon EX5-039 U ultimate | Vaccine | Birdkin <Fortitude> (When this Digimon with digivolution cards is deleted, play this card without paying the cost) [On Play] [When Digivolving] Suspend 1 of your opponent's Digimon with DP less than or equal to this Digimon's DP. --- [All Turns] While this Digimon is suspended, it gets +1000 DP.
Lv.5 ガルダモン EX5-039 U 完全体 | ワクチン種 | 鳥人型 ≪不屈≫(進化元を持つこのデジモンが消滅したとき、このカードをコストを支払わずに登場させる) 【登場時】【進化時】このデジモンのDP以下の相手のデジモン1体をレストさせる。 --- 【お互いのターン】このデジモンがレスト状態の間、このデジモンをDP+1000。