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BananaBolts
I was about to rant because people don't read what has been done and I had already tested and confirmed crouch cancelling was effective right away. Then I saw it wasn't mentioned in my thread, so good job testing it. And sorry for badly documenting.
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B
Babouli96
If you're talking about lasers specifically, the main goal is to shoot two lasers within a short hop. It's therefore called Short Hop Double Laser= SHDL. What you want to do (if you play on a n64 controller) is to be able to slide between left C to B in order to both short hop and laser as fast as possible. Then you can time the second "B" press to shoot the second laser. Ballin used to say the sound of the laser helped with timing. The important laser is actually the second one, as you want it to be shot as low as possible, but still shot (worst case is it doesn't come out). For example it is better to be able to do a short hop single laser as low as possible than to be able to do a SHDL, but only with a high second laser. With the same method (but pressing c slightly longer), you can do a full hop triple laser. This one is less important, it's more used when camping.
The other factors for speed are z-cancelled aerials, fast falls, perfect landings on platforms, etc. I assume you know all these techniques, but if you don't, please refer to the smash index.