I can't tell you anything more than to be aware that the picture tells the future. Read on to see what I mean if you didn't get that.
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       "I told you already. That's all we know. She only said what she wanted us to know. If I knew anything else then I would have told you," Gladion said to (y/n). He was only partially lying. He had told her everything Zinnia had told him except for the part where she mentioned that she was the good guy and Team Aqua and Team Magma were the bad guys.

      Zinnia had explained that sacrificing (y/n) didn't mean actually killing her. She just needed to be at the alter at the right time so that Lord Rayquaza could send a lot of energy to the earth for him to use to defeat the legendary pokémon Groudon and Kyogre.

        Gladion did of course tell her about the legendary pokemon and the teams who planned on killing everything because they wanted to remake the world.

      It reminded him so much of Lysandre who thought that the world should be made better. Couldn't the bad guys choose something else to do with their lives?

        "If you say so. I just have a bad feeling about this. You know we can't just sit here and watch all of this happen," (y/n) said.

      "Zinnia only seemed to attack when we were in smaller numbers. When Reiji was battling, he told me that she was the same woman spying on them at the contest." (Y/n) was truly looking worried about this whole situation.

        "That's it!" May shouted which startled the quiet atmosphere. Sje momentarily gained all of their attention.

      "We can give you two contest passes and then you can become stars like us! That way, you'll always have a crowd nearby to get your attention if Zinnia ever shows up. She won't strike back if too many people are around. We just need to head back to the Contest Hall in Lilycove. I'm sure Lisia won't mind making your costumes!" she said.

        It wasn't an entirely bad idea except for the fact that Gladion hated crowds and he hated when (y/n) got too much attention from anyone other than himself. He was also against wearing any kind of costume.

        "I'll pass," he said. Everyone looked at him. He could see why Brendan and May would look at him disappointingly but he never expected that from (y/n) but there she was looking all sad because he didn't want to go on some stage and perform for strangers.

      "Aww come on Gladion. It will be fun! Plus, we can use our newfound fame to get perks. I didn't get to go to the Battle Resort last time but I heard there was one here too. We might be able to go if we we're stars!" (y/n) said as she thought about the resort. May and Brendan didn't say anything about a battle resort but it did sound nice.

      He pouted at her for a little bit before agreeing. Satisfied, the four of them left May's house and flew back to Lilycove without much problem. When they landed and said goodbye to Charlie and Chase, they immediately heard someone calling to them. Well, more like just Brendan and May.

        "Brendan!!!!May!! You two are back!" she said tackling them both into a hug. She seemed a little too happy to see them both.

      "Yeah, we're back, but we have a favor to ask of you. We've decided to scout some new stars!" Brendan said. Lisia was just then noticing that (y/n) and Gladion were standing behind the two of them. Of course Lisia didn't know their names yet so she just stayed silent while internally yelling at (y/n).

      "Lisia, these are our new friends Gladion and (y/n). These are the new clever and toughness contest stars!" May said introducing them to Lisia who was giving them a very fake smile.

        "I was wondering if you could make their costumes like you did for us. I know it's short notice but..." May was saying when Lisia cut her off.

      "I'm sorry, May, but me and Ali are busy this week. Maybe by next week our schedule might be a little free but if you really want me too, I can maybe try to fit in making two new outfits. I won't promise you anything though," Lisia said.

        May and Brendan both said, "Thanks!" and highfived each other. Gladion was already regretting his decision to go with May's plan. If this was the girl that was making their so called contest outfits, then he and (y/n) were doomed. Well, mainly him because (y/n) looked good in just about anything no matter how ridiculous. Or so it seemed.

        "We should show them the backstage area and give them cosplay pikachus," Lisia said as she turned to walk off.

      Gladion noticed an evil looking grin on her face or was it just himself imagining things. Perhaps Necrozma could haunt his day dreams as well. When Brendan and May agreed, the five of them toured most of the unseen parts of the contest hall and eventually finished their tour.

      "Oh no! I've gotta run! Me and Ali are on in five and I haven't even finished Ali's preparations!" Lisia said before running off. Brendan sighed.

        "She's always been like that," he said as he scratched the back of his head.

        "Well, enough of that. It's getting really late and you two haven't even gotten to your own homes yet," May said gesturing to Gladion and (y/n).

      "Hey, now that I think about it, you two don't have anything with you. Did you already go to your house before going to the lab?" Brendan asked. Gladion would take this one.

        "No, we sent our stuff over here ahead of time. That way, it was a little easier for us to go sightseeing or whatever." (Y/n) just nodded in agreement.

      "Cool! So do you guys know where it is you have to go to get home?" Brendan said. This Gladion couldn't answer. He looked to (y/n) to see if she knew.

        "Well, we're supposed to be headed to Rustboro since that's where our apartment is. I heard you two earlier saying that you'd been there. Do you mind showing us the way. I left my map with Professor Birch," (y/n) explained. At the mention of his father's name, Brendan flinched. It was so noticeable that Brendan apologized as soon as it happened.

        "It wouldn't be a problem for us. We'll take you right on over," May said. (Y/n) and Gladion gave their thanks and then (y/n) went to a clear area to summon Charlie and Chase which of course caught the attention of a few pedestrians.

      Lilycove was a lot less crowded and quieter at night and Gladion liked that. He walked over to Brendan who seemed kind of down and he did something that he would never do unless it was his sister or (y/n).

        "Are you alright. You're being bothered by something aren't you," he said. Brendan looked at him with sad eyes and nodded.

      "I'll be okay, though. I'm used to it by now," he said. The four of them, Gladion and (y/n) on Chase and Brendan and May on Charlie, flew to Rustboro in silence.

        Since it was so late, (y/n) made arrangements for Brendan and May to stay the night at their place. Since there were two bedrooms this time, May got one and Brendan got the other which left (y/n) and Gladion sleeping on the couch.

      Gladion had no problem with that since he would be able to keep a close eye on her. Being near her when he slept also made it harder for Necrozma to haunt his dreams which had been happening a lot lately.

        "Night, Gladion," she whispered as she snuggled a little closer to him. He petted her head a little before saying the same and they both began to fall asleep.
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I just realized that the plot of this story has been kind of slow so I have decided to rush the story a little bit for the next chapter. Don't worry it won't be a huge timeskip or anything. Until next time!