Don't you think that Illuvium could come up with a "booster pack box" product? A physical collection of cards with stats, some game rules etc?
In this case, ideally, it would need to be mass produced and put on shelves everywhere in the world, side by side with the pokémon cards. No other way. I know it's a great task, but it's the way to do it in order to replace pokémon as a whole and get our game to new heights.
Maybe, this is something that should be done at the same time a studio creates a cartoon season for Illuvium (focused on children, just like pokémon), because kids need to look at the brand on that shelf, next to pokémon, and relate to a tv show, or else they won't go for it.