Splatoon.

smash Bros lags.... if it didnt, it would be way up there

I didn't think anything would top Mario Kart for me but Splatoon has. Mario Kart is great except for rubber band item assignment (admittedly it's part of the series) which results in too many matches where you feel like you got ripped off.

Splatoon's rotation is still stupid but it bothers me less now that I've gotten properly used to all the modes and stages, finding ways to succeed in all. There's only the occasional match in Splatoon which is lag affected which can be frustrating (dying before you even see the bad guys) but it's thankfully infrequent. The only other thing that can be occasionally frustrating in Splatoon is when you end up with a team or team mates that don't use even the most basic common sense strategies, but then again that's not really the fault of the game :)

It's a toss up between Pokken Tournament and Splatoon for me. Pokken because of the quick matchmaking, zero lag and disconnects and the depth of gameplay. Splatoon because you can literally spend hours just playing match after match and have incredible fun without being affected so much by lag or disconnects. Though there have been occasional matches where lag was a major problem and disconnections for no apparent reason.

MK8 and Smash have good online multiplayer too but I think Pokken and Splatoon just simply do it better.

Haven't played Pokken so I can't say but I've heard good things from it

I would go with Splatoon, since I play the game the most, and despite having a lot of issues, majority of the time, games are not laggy and is fun to play.

Do you mean lag, or enjoyment, cuz my answer varies.

Splatoon for enjoyment. Mario Kart for best performance.

Just whichever one you like the most.

Splatoon is the most fun, MK8 is the most smooth, Smash is the most competitive.

Don't have Pokken yet so I can't testify for how good that is though xD

Im not sure....... Since I only played POkken demo...... But from the ones I tried, I would say Splatoon!

But I do love how we are getting these awesome Online Multiplayer for Free!

Mario kart 8.I dont play much games online, but that game has a very stable online, at least compared to smash and specially splatoon.