Hoopa has one of the worst speed tiers in the game at 70, too slow to outspeed most offensive threats but too fast to be used in or counter Trick Room teams.

Source: https://www.cbr.com/weakest-legendary-pokemon-ranked/

Pokémon TCG: Sun & Moon - Team Up expansion featured a solid array of Dark-type cards including a holographic Yveltal and Hoopa GX.

Source: https://bleedingcool.com/games/dragon-ball-super-previews-power-absorbed-anilaza-super-rare/

Sometimes, Trainers who aren't a part of the core games' continuity are transported to the island by Hoopa, the partner of Pasio's founder Lear.

Source: https://www.cbr.com/pokemon-ash-vs-red-canon-to-franchise/