If they try and interrupt
Theres a sizeable contingent of Pokmon TCG experts who consider Emerald Break [XY6] to be the greatest Pokmon TCG set of all time
It draws three cards and ramps you, but it also passes itself to any opponent who hits you unblocked
This means they can be used as beaters that can easily flee after accruing some damage, or they can be freely sent in after your Active Pokmon is knocked out and then swapped out again for something else after you draw and potentially have a better counter to whatever your opponent has out
Ive played for nearly 15 years, starting with the equivalent of kitchen tables in college, moving into competitive Standard and Extended around Lorwyn and Shards of Alara, and then ending up back at the kitchen tables afterward
Wherever you are in the world, it seems the Pokemon TCG is an issue