Most of Mauville was actually enclosed within a big building. Liam felt like riding his bike thorough the indoor areas. Liam overheard a young boy with green hair talking with a man about the gym. The boy wanted to face the gym, to show he had been getting better. But the man, apparently his uncle to him: "Now, hold on Wally. It's certainly true that you've grown quite stronger alongside your Pokémon. But don't you think that jumping right into a gym battle might be pushing it?"
"I'm not pushing it." Wally replied. Ralts and I can beat anyone!"
Liam did notice that this Wally kid did look a tad sickly, and his uncle may have a point, however he could see that Wally wanted a chance to prove he had been getting better. The uncle firmly put his foot down and Wally sadly accepted that he wouldn't be allowed to challenge the gym that day.