>>50230079>one of the best extra facilitiesIt's just straight up the best.
>serves as Gym Leader rematches for the game>other gimmicks like mono-Type tournaments for general battle facility fun>whole series fanservice with almost all the previous Gym Leaders>ups the ante with previous Champions too>unlike other things like the Battle Tower, these runs are short and not an endless grinding slogThat's not counting the DLC that throws in Legendaries, anime tie-ins if you're into that kind of thing, and even real life VGC Champion teams to play against. It was the perfect balance between fun fanservice while having interesting rulesets and teams for serious players to mess with once in a while. Sad that Sword/Shield didn't have something similar when it would've fit right in thematically.