I’m actually intrigued by this opening, but I think there are a few things that could use some work.
First, you use a lot of exclamation marks. I’d try to cut down on that and try to highlight things in other ways. Second, you could put in a little more work on description, because you just told us they had conversations, when it might be really interesting to hear the conversations. Finally, I think paragraphs could be used to great effect here; they look better than straight up lines.
Riolu sounds like he could be an important character, but, then again, it is your name. I really like that pokemon, also. I enjoyed the insights into the characters thoughts, which helped me to see how they thought. I also liked the way the characters talked with each other because I could actually imagine the characters talking that way. When you were describing things, you paid attention to little details, too, which was fun to read. I do wonder exactly how Brandon is going to make his move, but I think I have inkling… we’ll see. I will definitely continue to read this.