Hmm...looks like we need to ban another member. Please ignore this clown, he'll be banned, I'll help you.
For Jigglypuff you want to pace yourself really. Jump, hit one, jump hit one, jump, hit one, jump, hit one, jump, hit one. That's what I do. Make sure you move quickly so you can jump further. It is a tricky configuration but that's the only way I have found to do it.
For Young Link you need to use your Boomerang. This is also tricky. Stand on top of the platform, throw your boomerang and immediately jump down onto the huge tree trunk to the bottom-left. Then the boomerang should pass right through the platform hitting the target.
Good luck.
And I would be grateful if no-one deleted Devilboy_209's post. I'd like to report him to the admins for a banning and I need the proof. Thanks.
I'm finished here...
Special thanks to Yossy666 for the avatar and signature images.