EonX
Battle Soul
The greater initial Speed is nice, but generally doesn't make much of a difference considering both Ninjask and Combusken ideally want to pass off the Speed Boosts to their teammates, rather than use the boosts themselves. Combusken's added bulk, neutrality to SR, and decent STAB options means that it isn't completely ruined should its attempt to pass boosts be stopped a time or two, whereas Ninjask almost always is due to frailty and 4x SR weakness.I guess that kind of crossed my mind tbh, but Ninjask does have a lot more initial Speed to work with, idk.