>>28021454Chesnaught is offensively versatile and can learn many TMs you find early like bulldoze, swords dance, and poison jab for fairies. Obviously you keep it away from flying types and have something like an electric or rock type in your party to counter them.
Delphox is a solid ingame pokemon. FIre/psychic is great coverage, has WoW to cripple physical threats, and its a fast pokemon. No downside to using it although having a little more movepool variety would be nice.
Never used greninja ingame so can't give much of an opinion on it. I don't like the look of it, but I think frogadier looks cool. Nothing wrong with a speedy water type I suppose but there's lots of other water types to pick from too.
