>>48452236colloseum was babby's first pokemon console story game, long before SwSh. The only reason you play it today is because you get free legendaries like the Beasts and a free Ho-oh at the end of the survival longplay mode through Mt. Battle, after which you can transfer and clone them all into Emerald. They didn't expect people to play it a long time neither, that's why the playtime counter maxes at 99:99.
XD is where they polish it: Characters are less lifeless, runtime is a little faster, more music and monsters, and Shadow purifying is easier
