As Ive mentioned several times before, Team Up saw the introduction of Tag Team Pokmon-GX, putting two or more Pokmon on one card, upping their HP, upping their power, and making them surrender three Prize Cards to balance them out
Going monocolor unlocks some cards like this, which S&G really take advantage of, considering you want to flood the board with multiple creatures as early as possible
Is Pikachu V-UNION worth buying
most notably, while Jin-Gitaxias gives you plenty of cards, she herself does not alter your own hand size, which means you would still have to discard down to seven unless you have a card that says otherwise
Also, a shoutout to others in this ilk like Bloodgift Demon