If you trade a tapu, is it possible to catch another one if you go back to their ruins?

Question

I really wanted to trade my tapu for a lugia, but if I can't get it back then no way. Can someone help?

Answer 1

No. You can't catch another one in that same game unless you restart it. If you really want another Tapu, you could always trade for another one via GTS or trading forum.