First off, Zelda has to approach Olimar- every time. You guys need to realize this first before we can get anywhere. Olimar outcamps her and also outranges her. She has no choice but to approach. If you're going to sit back and nair the pikmin off the whole match, then go ahead. I'll save my purples and throw them all at once. Zelda simply can't deal with the pressure of thrown pikmin that latch, the purple pikmin's knockback, and the threat of a grab all at the same time.
Din's fire won't do Zelda any good in the matchup. One pikmin latched onto you while you use Din's and you'll already have at least 10% by the time you get it off. It is very easy to shield Din's, throw a pikmin, and continue throwing them.
Nayru's, like Takumaru mentioned, should get punished every time it's used to reflect pikmin. It just has too much lag to be useful.
Actually, Zelda can RAR Nairs to confuse Olimar as to where she'll land ;D and then she'll lead into Dtilt or whatever, which we all know combos into Utilt and kills oli at what, 90%?
Again, it's shieldgrabbed easily. It doesn't matter how you jump, RARed or not. If Zelda jumps, the Olimar player shields. If you hit the shield we grab. It's simple.
I'm completely dumbfounded by the logic in all these scores. If Zelda supposedly was 75:25, that would undoubtedly make every character with attacks slower than oli's grab even worse. What are your scores for D3 and other heavies Danguuuur? Because as far as I know you've placed Zelda and only Zelda as the worst character in the game to fight oli.
While this isn't important to this matchup, I'l answer this anyways.
If a character doesn't have enough range to space against Olimar's grab, a projectile that can give Olimar trouble, an aerial attack->jab that can't be shieldgrabbed, great horizontal fall distance and/or speed, or particularly good edgeguarding, it's most likely going to be at least 70-30 Olimar. Zelda has none of these qualities. His worst matchup has all but one.
I'd like a discussion, but if you must move on to a different matchup, I understand.