So I've had a question for a while that I always forget to put on here and I've finally answered it, so I wanna share it with you guys.
Ever used Extremespeed and then tried to use it again immediately after, only to find that it didn't work? Well I've finally figured out why that happens and how to get around it if you need to.
If you're in the air when you use ES, then land, you'll NEVER be able to use ES again without jumping or getting hit into the air to reset it. This is true regardless of whether you ES directly into the stage/platform from the air, or expend its entire range, become neutral, and fall onto a stage/platform. The only exception to this is if you ES in midair and cling to a wall. In this case, you have to LAND first AND THEN jump or be hit to reset.
Most of you already knew this, but what I have learned is that there are differences between ability to re-use ES after first using it from the air, and first using it while standing on a stage/platform.
If you use ES directly from a standing position, you can ALWAYS use ES again immediately after. The only exception to this is if you travel in a perfectly horizontal direction while on the same stage/platform. In that case, all you have to do is bend your ES upwards at the very end, even if its barely noticeable. As long as you see Lucario go through his landing lag afterwards, you should be able to use ES again right away. If this isn't working for you, its probably because you have tap jump on and you're accidentally jumping when you input Up-B, thus registering as a midair ES.
Now you're all like "wow great, this is useful...". Well I realize that its not, after all how often do you use ES while on stage, let alone twice in a row.
What may be useful is the fact that you can (from a standing position) use ES to cling directly to a wall, and then use it again immediately after leaving that wall. You can't cling again after using it the second time, but you can grab a ledge, or simply gain a good amount of distance.
Basically, when using ES from a standing position, Lucario can use it again immediately as long as he becomes airborne sometime during the move. For example, it won't work again if you ES straight to the left or right while on Final Destination, but if you're on Battlefield standing on the left or right platform, you can ES straight to the other and then back again immediately because you're traveling over the air in between.
This is especially useful on maps with many moving platforms and walls, the best of which would be Rainbow Cruise. I can see myself using it on Frigate Orpheon when the right half of the map moves below the left and the wall is exposed. From the low platform, ES to automatically wall-cling, jump and attack, ES again in midair to follow, retreat, or recover.
Also, while I was playing with this, I sort of learned how to employ the ledge-cancel glitch. It seems to only work from a 45-degree diagonal angle above and away from any ledge, but to achieve it all you have to do is bend your ES right as Lucario meets the stage. You can do anything directly out of this, but I'm not sure if you can ES again because I didn't have the speed or presence of mind to try it when I actually got it.
Another ledge trick with ES is using it directly from the stage to automatically edge-hog an opponent. If you've ever tried to do this and flown off the stage to your death, try this instead. As long as the ledge is within range of your ES, and you're holding the stick in one specific place, you'll always grab it perfectly.
On the control stick, there are 4 "cardinal" directions (Up,D,L,R). Between each pair is a "semi-cardinal" direction (akin to NorthEast, SE, SW, and NW). If you're on the stage, use ES, and hold the stick in the space BETWEEN the notch for Down and either the notch for Down-Right or Down-Left (depending on which direction you're trying to go, left or right), you will always grab the ledge perfectly and not die.
Anyway, like I said, nothing new or particularly useful was discovered here. I just finally grasped a more complete understanding of ES and thought I'd share it with you guys. If anything was unclear or you're thinking of a possible exception, let me know and I'll see what I have to respond with. Sorry this turned into a f***in essay.