1) Forward yo-yo spin throw -- Ness' throws have almost the same power as each other. The reason that this throw is better is because when you're in an offensive game mentality, with 99% of your attacks attacking in front of you, you'll be more likely to be facing the edge as opposed to away from it most of the time.
2) Backward yo-yo spin throw -- Another advantage to Ness' throws as great launchers is that they both spin opponents around before they are released. When this is done, other opponents can get hit by the person you're spinning. Thus, they are knocked away from you and this lowers the counterability of these two moves.
3) Foot stomp -- Though not much of a move if you're not near a ledge, get near a ledge and use the foot stomp to an opponent in the air, and they'll be flying downwards very fast no matter how much damage they have. The facts that it launches downward effectively at any damage level and  that it is almost a guaranteed KO when connected on an opponent with no platform underneath him make it a great launcher. It's a great asset to learn this maneuver for the above reasons. Its only downfalls are Ness' slow jumps and therefore inability to connect and the fact that it's sometimes difficult to jump back onto the platform after you execute it.
4) Bat attack -- Though it's not very powerful (you'll probably need to be right near an edge to get a launch off of it) it is very quick and gives your opponents just a bit of fear that it might be the Homerun Bat item.
5) Back-front yo-yo attack -- More powerful than the bat attack but, because it attacks backwards before it attacks forwards, it takes a lot of timing to connect with. The fact that it goes in both directions also makes Ness vulnerable to counterattack during the recovery time.
6) Back kick -- This is a very powerful launcher but Ness' air moves are pretty difficult to connect with considering his wacky jumping style. But, if you're falling from a platform (i.e. after just getting launched), it should work very well if you can time it correctly.
7) Jumping headbutt -- Another powerful air launcher that is hindered by Ness' jumping ability. The problem with this move is that it has no range and, when Ness uses it, it totally stops his jump in mid-swing. Therefore, it's tremendously difficult to connect with and should be used with discretion.
8) In-air flying smash -- Maybe, just maybe, if you're opponent isn't paying attention or just preoccupied, you could hit him with this as you're coming back from a launch. But beyond the possibility that you're invincible and can get away with the setup time on this one, I wouldn't recommend trying it at all.
9) Flying smash -- A terrible setup time. The distinct possibility that you'll fall off the platform attempting this move, especially on small boards like Yoshi's Island. The fact that your opponent can see it coming from miles away. The fact that your opponent can see which direction you're going to be attacking in from miles away. If you actually connect for a launch with this move in a game, consider yourself lucky and never do it again (unless your teammate has a fireflower on someone of course).

• Ness probably has the most peculiar set of moves of any character when you consider his yo-yo, bat, etc. One of those peculiar moves is the energy shield which is unique in that, if Ness is hit with a projectile while performing it, his damage will lower in magnitude. Thus, Ness is the only character who can gain energy back without using the tomato or heart items.
• Ness' Up + B attack has the best range both horizontally and vertically of any character. This is done by hitting yourself with the projectile either on your side, or from below, or anywhere in between. It is also great for coming back in that it is very fast so it is hard to hit Ness when he's coming back and it is also a very strong launcher.
• Ness also has a very cool throw. When he goes to throw his opponent, he first spins him around and, in effect, the opponent becomes a weapon that Ness is using. If another opponent is near Ness when he is doing this, they will be hit, possibly launched, as well.

• Ness is one of the slowest characters in the air and has very few downward attacks and is therefore very much susceptible to attacks from below. He usually just cannot either get down fast enough or cannot move far enough or fast enough horizontally.
• Ness also has a very bad second jump for a few reasons. One is that it does not have much range in terms of comebackability from launches. It is also a bad jump because it is slow and takes him a while to get back to an attacking position (because it is a slow backflip).
• Ness' Up + B is a huge weakness in two situations. One is when Ness is not on the screen. In this situation it is obviously difficult to hit yourself with the projectile because you cannot see either of them. However, in Saffron City, it is even worse. If you fall between any of the buildings, it is near impossible to hit yourself back up because there is no room for projectile to circle around your body. Consequently, you're pretty much dead on that stage if such a situation arises.
• Ness' Up + B move also has another terrible side effect that causes two problems. If you use this move while you are near the edge, your opponent should just jump above you. If the projectile hits your opponent, Ness will simply drop to his death since he won't have another Up + B. He will furthermore drop straight down and you won't be able to move him horizontally. Therefore, Ness should usually only use the Up + B when he is far enough away from the edge so that no one can get above him and stop his Up + B move. This is bad however because then your opponent will have more time to block and see where you are going to land. And, since Ness will probably end up at the edge of the platform, he'll probably get smacked back even farther.
• Though Ness has a large variety of attacks, they almost all come under a similar weakness and that is that they take a long time to execute. Both yo-yo attacks, as well as the bat swing and the PK fire take a half second longer than other attacks to execute. What this means is that you're likely to be hit while trying to pull them off.
• Though Ness' back kick and foot stomp are both good launchers, they do lack a certain quality and that is range. If you are not very close to your opponent, you will miss with these moves and possibly get hit yourself.