I finally got my new Wii set up with Homebrew, so I spent a few hours unlocking everything last night.
Anyway, at the suggestion of Psychoace, I decided to give the Falcon Kick Ledge Cancel some experimentation, since I've never intentionally attempted to use it, and it seems like it has some promise. That said, being the lazy person I am, in figuring out that it's not incredibly simple, I tried to find a way to easily do it consistently on some stages, though it requires you not to hit an opponent on your way to the ledge, obviously. Thankfully, the technique itself doesn't require you to be frame-perfect, though the timing is a little strict. I'm not sure if this would be useful to anyone but the people just starting out with Falcon, but, it's something. Check out what I found--
Unless clearly specified, you are supposed to run and press Down-B out of your run at the moment suggested. If I specify a number ("the second light"), it is based on what you'll be passing from starting position (when you start your run) to ending position.
Battlefield - There is a post in the center of the Battlefield background, slightly behind where the characters would be. Down-B when Falcon's head is overlapping the post. Works on both ledges.
Final Destination - There is a diamond in the center of the stage. The "back" and "front" edges of it are cut off by the stage, and the white outline goes straight at that point (it's easy to understand if you pause and move the camera over it). Down-B when Falcon's head is at the end of where it cuts off (where the outline turns into a diamond again). Works for both ledges.
Smashville - There are always two Animal Crossing characters in the center (even on Saturday night, the best night for Smash Brothers). Down-B when Falcon's head is over the center of the second character's head. Works for both ledges.
Lylat Cruise - Down-B when Falcon's head is under the center of the center platform. This works for both the left and right ledges. Simple!
Yoshi's Island - In the center, there are two dark lines next to each other. Down-B right before Falcon's head goes over the first of the two lines. Works for both ledges.
Castle Siege - I'll break each area down individually.
Pokemon Stadium 1 - I'll break each area down individually.
Pokemon Stadium 2 - Another list...
Delfino Plaza - Here's a list...
Halberd - When you're not on the ship, there are two guard rails with brown and yellow lines. Down-B when Falcon's head is over the last brown line on the first guard rail. When you're on the ship, there is a pink carpet in the center of the background area. Down-B when Falcon's head is overlapping the carpet edge closest to the ledge you're moving toward.
Frigate Orpheon - On the part where there is a single center platform, there are four blue lights underneath it. Down-B as soon as Falcon's head is past the second light, and NOT when he is directly underneath. This works for both ledges.
I couldn't find a reliable method for Brinstar (the membrane makes timing unrealistic) or Rainbow Cruise. However, that's still a lot of places where we can set it up easily.
Anyway, at the suggestion of Psychoace, I decided to give the Falcon Kick Ledge Cancel some experimentation, since I've never intentionally attempted to use it, and it seems like it has some promise. That said, being the lazy person I am, in figuring out that it's not incredibly simple, I tried to find a way to easily do it consistently on some stages, though it requires you not to hit an opponent on your way to the ledge, obviously. Thankfully, the technique itself doesn't require you to be frame-perfect, though the timing is a little strict. I'm not sure if this would be useful to anyone but the people just starting out with Falcon, but, it's something. Check out what I found--
Unless clearly specified, you are supposed to run and press Down-B out of your run at the moment suggested. If I specify a number ("the second light"), it is based on what you'll be passing from starting position (when you start your run) to ending position.
Battlefield - There is a post in the center of the Battlefield background, slightly behind where the characters would be. Down-B when Falcon's head is overlapping the post. Works on both ledges.
Final Destination - There is a diamond in the center of the stage. The "back" and "front" edges of it are cut off by the stage, and the white outline goes straight at that point (it's easy to understand if you pause and move the camera over it). Down-B when Falcon's head is at the end of where it cuts off (where the outline turns into a diamond again). Works for both ledges.
Smashville - There are always two Animal Crossing characters in the center (even on Saturday night, the best night for Smash Brothers). Down-B when Falcon's head is over the center of the second character's head. Works for both ledges.
Lylat Cruise - Down-B when Falcon's head is under the center of the center platform. This works for both the left and right ledges. Simple!
Yoshi's Island - In the center, there are two dark lines next to each other. Down-B right before Falcon's head goes over the first of the two lines. Works for both ledges.
Castle Siege - I'll break each area down individually.
For the first part, Down-B toward either ledge when Falcon's head is over the part where the ground starts slanting.
For the second part, there are cloth platforms on the top left and top right of the stage. Roll to either edge of either platform and Down-B. Easy!
For the third part, there is a hump in the center. For the left ledge, Down-B when Falcon's head is over the point where the ground stops slanting. For the right ledge, Down-B when Falcon's head is past the point where the ground -starts- slanting.
For the second part, there are cloth platforms on the top left and top right of the stage. Roll to either edge of either platform and Down-B. Easy!
For the third part, there is a hump in the center. For the left ledge, Down-B when Falcon's head is over the point where the ground stops slanting. For the right ledge, Down-B when Falcon's head is past the point where the ground -starts- slanting.
Pokemon Stadium 1 - I'll break each area down individually.
On the Normal part of the stage, the inside of the Pokeball on the ground has a gray circle. While running, Down-B when Falcon's head is directly over the gray area closest to the ledge that you're trying to Falcon Kick toward.
On the Water part, there is a wooden area under the windmill that goes into water on the right side of it. Down-B when Falcon's head is directly over the area where they overlap (it clearly turns much darker as a result of the water over it). Note that this only works going toward the left, and that the windmill must be in a certain position so that it doesn't block you.
On the Grass part, for the left ledge, there is a small stream on the ground in the center of the stage with dirt on either side. Down-B when Falcon's head is over the right dirt line for the stream. For the right ledge, there is a low-polygon rock on the center-right of the background with obviously jagged edges. The left side of the rock is a significantly lighter color than the rest of it. Down-B when Falcon's head overlaps the light part of the rock.
On the Rock part, you can roll to the left on the 45-degree slant near the center and Falcon Kick to the right ledge. That said, since you can't get there out of a run, it isn't faster than just jumping/running there, so its use is limited.
On the Fire part, you have to be standing, rather than running. Down-B to the right when Falcon's head is directly under the left edge of the main platform. Like the Rock one, you can't get there out of a run, so its use is limited.
On the Water part, there is a wooden area under the windmill that goes into water on the right side of it. Down-B when Falcon's head is directly over the area where they overlap (it clearly turns much darker as a result of the water over it). Note that this only works going toward the left, and that the windmill must be in a certain position so that it doesn't block you.
On the Grass part, for the left ledge, there is a small stream on the ground in the center of the stage with dirt on either side. Down-B when Falcon's head is over the right dirt line for the stream. For the right ledge, there is a low-polygon rock on the center-right of the background with obviously jagged edges. The left side of the rock is a significantly lighter color than the rest of it. Down-B when Falcon's head overlaps the light part of the rock.
On the Rock part, you can roll to the left on the 45-degree slant near the center and Falcon Kick to the right ledge. That said, since you can't get there out of a run, it isn't faster than just jumping/running there, so its use is limited.
On the Fire part, you have to be standing, rather than running. Down-B to the right when Falcon's head is directly under the left edge of the main platform. Like the Rock one, you can't get there out of a run, so its use is limited.
Pokemon Stadium 2 - Another list...
On the Normal part, the Pokeball's small center circle is outlined in black. Down-B as soon as Falcon's head is past the line closest to the ledge you Down-B toward (again, NOT while it's directly over the line).
On the Electric part, Down-B under the center of the center platform. Keep in mind that the conveyor belts will help you if you're a little early, so it's better to be early than late here.
On the Flying part, for the left ledge, Down-B when Falcon's head is under Skarmory's beak. For the right ledge, Down-B when Falcon's head is directly under the center of the center windmill.
On the Ground part, you can roll to the left (into the dirt wall) and Down-B to the right. Funny how this works for the Rock part of Stadium 1, as well.
On the Ice part, for the left ledge, between the background house's door and the edge of the front of the house, there is a small amount of space (thin rectangle). Down-B when Falcon's head overlaps that space. For the right ledge, there is a snowman with a bucket on his head. Down-B as soon as Falcon's head is past the bucket.
On the Electric part, Down-B under the center of the center platform. Keep in mind that the conveyor belts will help you if you're a little early, so it's better to be early than late here.
On the Flying part, for the left ledge, Down-B when Falcon's head is under Skarmory's beak. For the right ledge, Down-B when Falcon's head is directly under the center of the center windmill.
On the Ground part, you can roll to the left (into the dirt wall) and Down-B to the right. Funny how this works for the Rock part of Stadium 1, as well.
On the Ice part, for the left ledge, between the background house's door and the edge of the front of the house, there is a small amount of space (thin rectangle). Down-B when Falcon's head overlaps that space. For the right ledge, there is a snowman with a bucket on his head. Down-B as soon as Falcon's head is past the bucket.
Delfino Plaza - Here's a list...
There is a circle in the center of the main stage area. Down-B when Falcon's head is past the first part of the orange outline (when it's past the first part of orange that characters can actually step on).
On the part with the umbrellas, run to the left and Down-B when Falcon's head overlaps the pole of the left umbrella.
On the part with the building rooftops, you can roll into the right wall and Down-B.
On the part with the large Shine Sprite, you can't run and do it, but while standing, Down-B when Falcon's head is over the part where it starts to slant. Works on either side.
On the part with the main plaza (and a fountain in the background), Down-B when Falcon's head is past the manhole cover. Works on either side.
On the island without a pipe, Down-B when Falcon's head is past the last leaf. Works on either side.
On the island with a pipe, for the left edge, Down-B when Falcon's head is past the pipe. For the right edge, Down-B as soon as Falcon's head starts to overlap the tree trunk.
On the part with the umbrellas, run to the left and Down-B when Falcon's head overlaps the pole of the left umbrella.
On the part with the building rooftops, you can roll into the right wall and Down-B.
On the part with the large Shine Sprite, you can't run and do it, but while standing, Down-B when Falcon's head is over the part where it starts to slant. Works on either side.
On the part with the main plaza (and a fountain in the background), Down-B when Falcon's head is past the manhole cover. Works on either side.
On the island without a pipe, Down-B when Falcon's head is past the last leaf. Works on either side.
On the island with a pipe, for the left edge, Down-B when Falcon's head is past the pipe. For the right edge, Down-B as soon as Falcon's head starts to overlap the tree trunk.
Halberd - When you're not on the ship, there are two guard rails with brown and yellow lines. Down-B when Falcon's head is over the last brown line on the first guard rail. When you're on the ship, there is a pink carpet in the center of the background area. Down-B when Falcon's head is overlapping the carpet edge closest to the ledge you're moving toward.
Frigate Orpheon - On the part where there is a single center platform, there are four blue lights underneath it. Down-B as soon as Falcon's head is past the second light, and NOT when he is directly underneath. This works for both ledges.
I couldn't find a reliable method for Brinstar (the membrane makes timing unrealistic) or Rainbow Cruise. However, that's still a lot of places where we can set it up easily.