Can we revert it to how it was previously?
It would be suuuuuper annoying now to have 30-40 sync Pokémon in your Pc just for the repel trick...
I mean, does everything has to be 100% like in the originals? ._.
Depends, did you talk to Ash by chance who is also at this Route after you obtained the item? Then you may not have it, else Im not sure. Anyway it is a item part of the Ash hat quest.