Beverly
If Leon was fazed by a little trip, he wouldn't be deemed the strongest trainer in Galar then! "I'm fine, of course!" He reassures her and gets up himself. Inspecting the treasure chest further, he leans in to look at it with a hand on his chin. "I don't know *How* I didn't see that sitting there." Reaching forward, he surprisingly snap the thing open. It didn't have a lock at all. Inside, the contents are... These weird looking Pokéballs. They look like any common ones any trainer would know, except somehow there were these weird lacings all over them. They looked like veins. "Maybe they're old?" He shoots a glance over at Charizard and his buddy appear tensed. "Broken Pokéballs left behind. We should take them along." There was surprisingly a lot in the chest so Leon decided to take only a few. It could be a souvenir in some way.
Michael
As she looked into the chest and at those old pokeballs, she decided to take some to inspect them some more. "Maybe they are rare ones..." She had never seen a pokeball like this and was excited to know more about it and it's history, she went by Leon's side and putted the pokeballs into her bag and putted it back on her back as she smiled. "I think it would be really nice to know their history! What if they were used for legendaries pokemons.." As she thought of this she got more and more excited and determined into their little adventures.
Beverly
"Yeah..." Normally anything with history would be dusted but these Pokéballs look as though they've been in used(?) Who could use such weird items? "I know someone who could probably see what's the issue with them." The veins that envelope the Pokéballs is what's most concerning. Suddenly, Leon doesn't want to stick around any longer. Who knows, maybe this secret base wasn't as empty as he thought. "There's not much here. I think it's time we leave," He suggests in a matter-of-fact way just to not startle the gym leader. It's only in his suspicion that someone or more could be lurking in the dark. "... Unless you want to explore more, otherwise, show me your Gengar's night vision!" As he began walking, he tries to strike up a conversation to distract himself from the sense of paranoia. "So your Gengar... Is very overprotective of you, huh?" Just like every Gengar he met on the island. For a Pokémon known to be mischievous, it's quite the adult in situations.