Hello there @Anhiuemgengar I'm afraid that once you have made your choice, the quest cannot be reset. Your only option to obtain the Gardevoirite would be continue and complete the quest, obtain the Galladite and then buy the Gardevoirite from Wally for 100 PvP coins or 200 PvE coins.
Earning such large sums of coins can seem like quite a daunting task, but thankfully there are many ways to earn PvE coins here in PRO. Here are a few ways you could earn the required PvE coins:
•Bosses offer 3 or 5 PvE coins each for defeating them on Medium or Hard difficulty
•Collector Joro offers 5 PvE coins for each OT form that you submit (3 PvE coins for non-OT)
•Bug Catching Contest can give up to 3 coins daily. Multiplayer Bug Catching and Fishing Contests can also yield high amounts based on your overall server placement
•The Monotype Tournament is a great way to earn PvE coins whilst also collecting Z-crystals for completing the tournament with different Monotype teams
•Dungeons are another great way to earn PvE coins, but are also quite difficult to beat and are aimed towards more experienced players
I know this isn't the answer you was hoping for and I apologize for that. If you have any questions related to this topic, please let me know.
Houndstone