I think you're right and there is another one up there. Try this guide, look at the picture for the level you're talking about. I have a low-res version of it, haven't bothered to get that one since my computer got wiped, and I think I see it. And I think he's right, you can't get it. Must be close though
How very odd.

I'm stuck on the final time trial, last level. It's killing me, I've got EVERYTHING else. Have you got all the pickories?

OH that makes sense. Did you get to it eventually? How'd you find out it was an eaty one?
Isn't there some way you can check? A stats screen? I forget exactly. Doesn't something pop up when you highlight the level?

Yeah I don't think it does anything either. I have them all. I wish you got stuff for completing the game, I hate games that give you nothing.
But still, if you wanna get everything, pickories is part of that