Ness in Smash Ultimate seemed to have some changes.
For example, his infamous headbutt is replaced with peach's up air. Not that strong and great as the previous iteration but it is still pretty good. He has a new animation on PK Fire and PSI Magnet got a buffed as it now has a larger hitbox.
PK Thunder is pretty much the same but I think it was nerfed slightly, less tighter arc and its slightly slower to wind up to PK2. Still barely noticable. Oh yeah PKT can bounce.
His down throw combo is still there but it is harder to do because of its different angle.
B-Throw is still stupid strong as always.
He also seemed to have a new idle animation as well.
Overall, Ness is pretty good and may be viable but who knows...
Also, Fox is heavily nerfed in that game, FeelsBadMan..
He seems to have a quite a bit of range buffs, such as his new up air and n-air having disjointed hitboxes and improved reach. Also his PK Fire's new animation is marginally slower than the previous one, although it is definitely a much needed change if you go on For Glory. Also, his magnet has a hitbox now? The PK Thunder changes seem to be a mixed bag, although I consider an overall buff, but time will tell. Overall, he seems to be viable once again, but we will have to wait.
Some character's down throws in general, such as the Mario Bros, are nerfed in terms of combo-ing, though this seems to be compensated by the majority of moves having less lag and connecting more reliably into other moves (as seen with ZeRo's Mario).
Btw, the physics in the game is going to help Lucas immensely from the looks of things. Judging from his short video (each fighter has a short video on them on the Smash Bros website), he seems to have some direct buffs as well (his PSI Magnet looks stupidly buffed lol). Overall, I have some good expectations for him this time around.
Is is true about Fox? Bummer. Falco's lasers seems to shoot faster and has less lag, so he is a better character already. XD
Despite Bayonetta getting nerfed. She still got some bs stuff, such as this 4 stock massacre.
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The fact that Green Greens has a Flat Zone-esque vertical blastzone, and Plup was playing the largest character in the game didn't help. lol
Welp they buffed the Sh** out of Pacman. Faster grab with no "Roy zones", Fruit cycles faster, F-air more Hitstun, More range on Side-B/less end lag, MUCH stronger B-air, Hydrant lasts longer (Though I heard people say that might be nerf)
I even saw him being able to use his jab to cancel the water. If other fighters can do the same, it is overall a nerf, but it makes setups easier... yeah, he is stupidly buffed, and it is cool to see his grab actually function like in Galaga instead of it being a sad excuse for a grab.
On a side note on talking about SSB4's low tiered characters, while I like Ganondorf's and Zelda's redesign and buffs, they kinda seemed underpowered in comparison to everyone else, especially considering the seemingly good buffs given to Jigglypuff (according to it's short video).