Today's opponents are the Hoenn duo. To be honest, Chen Ming would rather not face them if he had a choice.
Even if Chen Ming hadn't come, that veteran Rayquaza would step in to resolve the situation, and the ensuing extreme weather would naturally dissipate. There was really no need to get too involved.
However, rather than asking a favor, Professor Oak was more interested in using this opportunity to let Chen Ming see the wider world. There was no reason to brush off the Professor's good intentions.
Chapter 51