Tech that ****!
...if you can >_>
I spend most of my time on right side, performing aerials and then snapping to various edges. It's risky business though because you can get Klapped if you're on the edge of the lower platform. What I like to do is grab the edge of the rightmost platform, when ledgehop an aerial and grab the edge on the other side. And sometimes move back and forth beneath that platform. Such as letting go, then jumping below it and grabbing the other edge. Just lots of edge games to mess around with. Take advantage of the ledge invincibility when you can.
It's almost impossible to die in the water, no matter where you are. Even if you fall in from the left side. Just jump twice really fast and bike to safety. It's hard to edgeguard an opponent who falls into the water, but do your best to pester them as much as possible. Run over and grab onto an edge that you think they might grab. This usually forces them to try and grab a certain edge because it's the only one available. Then try to exploit it from there. Basically make them go where you want them to go.
Whenever you're fighting on the middle platform, try to get them on the higher middle platform so you can land a few claps from below. The left side of the stage is risky because there's less time to recover, however you can get some easy gimps on your opponent if you play your cards right. Also, try not to ever have the bike laying around. It's extremely important because you're basically screwed without it. If you do bike, make sure you break it ASAP or just ghostride it into the water. Remember, one of the fastest ways to get a bike on the ground is to run off the stage, then almost immediately bike in the opposite direction. The bike crashes into the stage and lands on the ground, so now you can break it quickly for tires.
As PhantomX mentioned, you probably won't be getting any vertical kills on this stage. So feel free to spam the clap to your heart's content . It racks up tons of damage whether it's fresh or not. Spam it! Save that fsmash for later
Remember when I said Wariocide has an odd twist on this stage? What I mean by that is you can often score a kill by "Wariociding" them into the water. I usually just ledgehop a bite and take them down with me. Now that you're both in the water, you can royally screw your opponent over. Land a footstool, steal the edge they try to grab or just hit them when they try to jump. Also, some characters just plain suck at recovering on this stage, so all you have to do is get them into the water. A bite is usually the easiest way to do so. As Hoots mentioned, your opponent is released first. The work is usually done for you. =]
It's my favorite stage this and Green Greens.
That's what I'm talking about! Mind if I just drop most of this in the summary? It's way too good to just be hanging around on page 8.
You're a champ 56k.