You may play those exiled cards even if you no longer control The Legend of Roku
It features their exclusive logo at the bottom right corner, like so: It was also illustrated by Megumi Mizutani
Expect Common, Uncommon and Holo Rare commons through to Double Rare EX cards, Illustration Rare trainers and Pokemon, Ultra Rare full art trainers, Special Illustration Rare alternate art EX cards, and Hyper Rare gold etched cards at the top of the pull rates
A further variant, TAG TEAM Pokmon-GX, was introduced in the Team Up set, featuring two or more Pokmon on a single card - and more HP than their solo GX counterparts accordingly, along with attacks that can be boosted by attaching additional energy cards as stated by their rules
Conclave-Sledge Captain comes with three instances of Backup, allowing you to spread the +1/+1 counter love around