At the time, this was the only official representation of those cards, and they were not avaliable for the general playerbase to use
Soul Levy will mill 3 cards from your opponent every time they special summon a monster
The Mega Evolution series has sent master set values soaring past 3,500, with chase cards like Mega Lucario ex SIR now sitting at 719 raw
Ive also been able to find some cards from later Topsun cards, like with generation 2: Or gen 3 (these I actually own myself - since Seviper is my favorite Pokmon, I bought a bunch of non-TCG Seviper cards recently
But XY is past, and in this go-around, we have zero capital letters in the "ex", so, do we have to explain the meaning to all, and find it too complex to understand in the eyes of some who weren't here when XY was, or can we interpret this go-around as a different way to Mega evolve, TCG-style, and remake mega turbo under a different name, and leave the past alone as "different", just like NVI's Eelektrik compared to BLK's Eelektrik