100% isn't death guys. Haven't you ever seen someone survive up to 150% against Snakes?
Sheesh... this is the problem with Brawl, everyone sees "omg new 0-100% CG" and goes, "hey, this matchup is now worthless. No need to bother playing it! Just resign and counterpick." Grow up and grow a pair. This makes the matchup hard, but not unwinnable. Remember when Falco's cg->spike killed Falco and Wolf? How many times did you see that in a match? Was it every time? Did that make those matchups unwinnable?
This just means that we have to be careful not to get grabbed around 20ish % against Pika. It makes it harder, but not impossible. Camp up and play smart and you'll be fine. If Pika tries to Fair approach, shieldgrab him and backthrow him away, iap to the other side of the stage, and camp up again.
If Pika is going to spend the whole match trying to get that CG, it's in your favor because he's going to be predictable. Kick his ***. SH over him and Bair, spot dodge his grab and grab him back, fight f or controller port priority, and then play a different character round 2. Or you can sti on these forums all day and complain about how this matchup is unwinnable.