I'm testing out a physical sweeper build, since its phys attack is just slightly lower than his special one. Besides, he has access to Power-up Punch, which is his only "increase stats" move, it is like a Howl but with 60 base attack (including STAB), not bad at all.
Greninja @ Flying Gem
Protean/Jolly Nature
4 HP/252 ATK/252 SPE
Rock Slide
Acrobatics
Power-up Punch
Shadow Sneak
I know, I know. No WATER of DARK moves?? But well, why would I, after all, greninja is the type he wants to be, so is not attained to have certain attacks for "stab"... they all have stab. Waterfall may have 5 more attack that Rock Slide, but rock has more super effective targets than water. This is why I choosed each attack:
- Rock Slide: A lot of coverage, it kills flyers, fire, ice and bugs. Is a nice way to OHKO Talonflame, which is running rampant online. I'd have prefered Stone Edge, but too bad he doesn't learn it.
- Acrobatics: The best move in the entire set. Flying Gem will allow for some OHKO, and after that is still a really strong move. Is the one I abuse the most for serious damage.
- Power-up Punch: Its only way to increase stats. Two of them will make him ready to sweep a lot. Not sure if this can OHKO Lucario (I guess it will if it is not mega), but at least you will deal really severe damage against it, and it can 2HKO anything that you're super effective against. Using this as a revenge-killing grants free attack for the next combat.
- Shadow Sneak: Revenge-kill move if the opponent has priority, or if you predict a fighting move going against you, you can get a free hit, and your opponent will deal none to you. Having both ghost and fighting in the same build allows for an extra power-up punch to increase more your attack while playing mindgames with your opponent.
That's it, I want a competitive set, but also I feel this one feels the most ninja out there (just the added value). That is, two nice attacking moves, and two utility ones. I'm still not sold on the special attacker one, because he is missing the buffs that a physical sweeper can give.