Arceus cards always hold special weight in the market, and this version is no exception
Counterlash not only disrupts your opponent's plans by countering their spell, but it also gives you a massive body that can quickly turn the tide of the game, assuming you have cards in hand that overlap with the type of spell you countered
My Verdict: Baronne de Fleur offers a combination of power and utility thats incredibly difficult to beat
Beyond that, there is no rhyme or reason to which cards exist in which versions*.4 Are EX, GX, V, etc
Pair her with creatures that naturally have flying or grant flying to smaller creatures to ensure consistent value every combat phase
Bring back all your equipment and aura cards from the graveyard, attach them to your enchanted creature, pump that creature for each of those cards, and profit