You dont have to keep track of exactly which card came from what pack, but I recommend recreating packs with the appropriate ratio of commons, uncommons, and rares/mythics
You can only use 1 "Rose Shaman" effect per turn, and only once that turn
Pokmon TCG Pocket is similar to the traditional card game in the sense that trainers need to open packs to collect the cards they need for deck building
Table of Contents show What are MTG Arena Wildcards
Likewise, being 2 XP to downgrade your deck in most ways is rough, and the only way to justify it is if you built your deck around a card you lack access to and you seriously risk never drawing it outside of Seeker
Both 129 Skitty Colorless 60 Tackle (20) Both 130 Delcatty Colorless 90 Energy Assist (30) Take a colorless energy from your energy zone and attach it to 1 of your benched Pokmon