Atlas here is likely the least efficient way imaginable to do that, but its here if you need it, and cheating it in a sacrifice deck might be fine
Details such as clothing, armour and props should feel connected to the characters world and their environment
Although the best when it is good, it is close to the nut low when not optimal
If Mewtwo decks weren't good enough already, the Mythical Slab provides another way to draw your Gardevoirs and Mewtwos
Additionally, the English version of a Pokmon release may merge the card lists for two or more Japanese releases
Others that lean more into reanimation like Karador, Ghost Chieftain or The Mimeoplasm are also worth considering, but let's go with Tasigur for more utility and a varied strategy like the original Vintage deck has