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As some of you may know, Mewtwo's Ledge Jump > Down B has some interesting momentum properties.
We're able to more or less recreate this with Yoshi's Up B since it also affects Yoshi's momentum.
However, as you can see here, Yoshi's first Egg Toss doesn't work very well (though Ledge Drop > Egg Toss is still a pretty good option, not shown here)
Though Egg Roll has a similar effect, we can do better.
Egg Toss's height decreases with every toss, the third one being the lowest. This third toss is very similar to Mewtwo's Down B.
However, the fourth toss does nothing, shown here.
This doesn't really have a use, since Egg Toss has too much lag to combo into anything, but you could do this if you want a grounded Egg Toss rather than an aerial one.