Um, sir, I do not think a suit would be useful on a journey such as this one.

[He isn't sure what a suit is, to be honest, but it sounds formal!]

As for the other Pokemon, it depends on where you go. Most attack when you walk into the brush, others will attack if provoked. However, I suggest keeping to the battles so that your pokemon may gain experience and become stronger. That is what this journey is supposedly about.