However, if you can produce the actual card you've named, the equipped creature will also have that card's art, watermarks, and flavor text
(And Mega Evolutions without pre-evolutions are simply Basic Pokemon, like Mega Kangaskhan ex.) To make up for neglecting their regular forms, the Mega cards have a special note that says they're the Mega-Evolved forms
This is one of the only strategies where you might unironically see a card like Sheltering Ancient
Notably, if a Siege never had defense counters on it (perhaps because a permanent became a copy of one), it can't have its last defense counter removed
However, it gives your deck a consistent game plan should your efforts on board fail
Stores that do adopt this design are likely to see increased foot traffic throughout the premises