So I had a random thought late at night and checking the frame data suggests it *might* actually work, but I'm coming here to post the idea and see what people think.
Two important sources for this [most of the data for this stuff is here]:
http://kuroganehammer.com/smash4/pikachu *and*
http://kuroganehammer.com/smash4/sheik
So we [should] all know by now about Sheik's amazing 50/50 with dthrow at high percents. Yes, it stops working if we reach like 170%, but let's focus on that critical zone of about 110% to 140% [give or take, rage dependent and stage dependent], where she has a frame 5 uair and a frame 36 Vanish. As we all [hopefully] know, immediate uair loses only to airdodging almost instantly [too fast to react for the most part, although sometimes you can rely on cues like an immediate double jump to try to time an airdodge], and the threat of uair killing is usually high, while Vanish loses to a jump away OR a delayed airdodge, but will usually kill you for immediately or almost immediately airdodging [you can try re-airdodging, but the timing is such for Sheik that hitting the not-very-large 8-frame window happens quite consistently].
However, an option I've never seen people try is Thunder. For those who don't know, the cloud spawns frame 2, meaning the bolt WILL come down if Pikachu does Thunder for more than 1 frame. However, the kicker is that Thunder is invincible frames 34-44. What does this mean?
If stuff works the way I *hope* it does [haven't tested yet, either with someone or in tournament]:
- Sheik dthrows us
- We thunder
- They either uair or Vanish
- If they uair, Thunder will *hopefully* interrupt the uair, saving us from the part with the KB (the final hit), and also launch her upwards [which might actually KO her if she's at high enough percents, but certainly leaves her in an undesirable position]
- If they Vanish, the Thunder hits us, and because we have a 10-frame window to protect ourselves for 3-frames [34-44 vs 36-38 for Vanish], there's a decent chance [given how the timing hopefully works out] that we just don't get hit with Vanish because the Thunder's invincibility protects us.
NOW, this DOES lose to a delayed uair [I think, more on that below] or someone reading the Thunder and punishing it (I've often nair'd out of it and been told it ends deceptively early, but that endlag exists], but even then, we'll have fallen some distance (probably) due to Thunder not hitting Pikachu for a little over half a second, which means we're further from the blastzone, extending how long we live against uair, and we also have a nice, powerful hitbox covering us for a few frames that make the punish a bit riskier than they'd like.
I'm not saying this works, but the numbers suggest it is very promising. Any input or feedback is appreciated - I'm probably going to test this myself, but someone confirming this works would be fantastic, and someone explaining why this fails would be appreciated [disappointing, but appreciated]. If it does work, then it adds a whole new element to the 50/50 that beats any immediate options, and also serves as a way to make uair kill later [via falling farther before getting hit with uair], meaning the 50/50 should work for a shorter time period...