Unlike other card games at the time, Pokemon: The Trading Card Game was built with children in mind, even if adults often ruin the fun, so heavy mathematics needed to be replaced by something
While were running most of the good transforming artifacts already, why not include some Incubator cards
Happy stacking
The companions are already considered too powerful mainly in the eternal formats, the most notable of these, for sure is Lurrus of the Dream Den, whose restriction is "not having permanents above 2 in the converted mana cost"
The image posted shows thousands, if not tens of thousands of pounds worth of cards
And as another option for Duel, players can also join or create rooms for casual duels or maybe to try out some limit testing with their newly formed decks