For such an important date, the creators of Pokmon have made every effort to create cards with legendary and famous Pokmon
Due to the self-reinforcing nature of the Fusion Strike mechanic, where Fusion Strike cards need other Fusion Strike cards to work efficiently (think of how Mew VMAX needs other Fusion Strike Pokmon to copy attacks from, or how Genesect Vs Ability works better the more Fusion Strike Pokmon you have in play), Mew VMAX decklists cant branch out too much, even compared to the other Battle Styles
Collectors, ready your strategies
A handful of new Lost Origin cards play around this mechanic, like Sableye or Giratina VSTAR, which both require 10 cards in the Lost Zone in order to use their most powerful attacks
The Sultai uncommon three-cost sorcery is next
Its a fascinating commander, and I cant think of another that plays out the same way