I like Pokemon more than you! :p
We covered the rules of V-UNION Pokemon when they were first revealed back in June.
Four different cards form a V-UNION Pokemon. A V-UNION Pokemon can only be played to your Bench when all four cards are in your discard pile. Since all four cards of a V-UNION share the same name, you can only have one of each V-UNION Pokemon in your deck. When fully assembled, they’re neither Basic Pokemon nor Evolution Pokemon — their stage is “V-UNION.”
Now TPCi has posted an article that clarifies some of their trickier...