>>48125473I'm not saying it has content no other game has, I'm just saying it has enough content that it holds up very well among other S tier games like Emerald and Platinum. That being said, there is some exclusive content that Crystal has:
>Pokégear>Apricorn ball crafting>Bug Catching Contest>Trainer House>Ruins of Alph>Room decor>Second regionAnd the rest is just stuff that other games also have:
>Battle Tower>Breeding>Pokédex completing>Shiny hunting>E4/Red/Rival rematches>Exploration>Berry collecting>Loads of sidequestsAll in all, it has most things the newer games have, as well it's own exclusive little features too. It's just as complete a game as Emerald and Platinum, but I just happen to prefer Johto over Hoenn or Sinnoh.