I think that a good battle is something we all want just like when Ash was in the Johto Silver Conference and had to battle the guy with Blazekin and lost. That was a good battle and the battle that Ash and Gary faced off in with Blastoise and Charizard. Those I think were some of the best battles I have seen and they did not use their old pokemon. My point is that Ash could have as big of a chance battle with his old tough pokemon as much as his tough new pokemon. Did you see the way Pachirisu was basically tiring out Ash and Co.'s pokemon and the Spark attack? That is an example of a tough wild pokemon that they got and could win a lot of Battles. Buizel was really tough and now Ash has it so that can win some.