>>22404052It's because 95% of them were in Dream Balls. None of these Gen 6 legendary events are tradeable anymore if they're not in Cherish Balls. If a pokémon becomes untradeable they don't show in GTS search, even if they're deposited (for instance, you can deposit Hoopa, but you can't find it)
Another thing is that after ORAS 5 more event legendaries were available in gen 6 (one is Deoxys who is not even event-only anymore), meaning most pokémon from GTS are now obtainable and makes "cleaning up" easier.
