Once the player reaches a Stage whose number corresponds to a new set of Decks of a particular level, the Standard Duelists start using Decks of that level
Different printers use different safe margins, but the principle is consistent: dont park your most important details in the danger zone
Going back the original example many paragraphs ago, let's look at the two cards you milled away: Milling the Gearhulk, if they are playing a Constructed deck, is likely an indicator they have even more Gearhulks
However, theres no evidence that Wonder Pick works in Pokemon TCG Pocket by any other mechanic than a simple shuffle
After you learn the riffle shuffle and bridge, check out our walkthroughs of other card shuffles you can try out
Geth, Lord of the Vault + Chainer, Dementia Master Reanimating creatures from your opponents graveyards is cool, but Geth, Lord of the Vault and Chainer, Dementia Master have such high casting and activated ability costs