Use Raticate in order to get oppent's pokemon to 10 HP then use Hisuian Sneasler in order to finish it off! Use energy recycler in order to get your energy back and keep repeating. Jirachi allows attacks to be blocked off bench giving the upper hand. Brute Bonnet is used later in end game and it's ability allows you to get chip damage off. For Greninja you can use his attack in desperate times but it's mostly there for it's ability. Credit to Mr.Brown for the inspiration!