100Marios, I agree with you on Spongebob. It was great, so unique, but it has really lost its luster. Oh yeah, and Lady Machoke said not to list anime as a cartoon you dislike. Also, Powerpuff girls isn't very girly, it's pretty violent and funny.
Um... oh jeez... let's see...
Cow and Chicken, Shnookums and Meat, any Ren and Stimpy clone. I loved Ren and Stimpy, but the clones all suck.
The new Rugrats. The old ones were neat, but ever since the retard Dil came along, the episodes got worse. And its' more disgusting.
Catdog. Unfunny and gross.
Timon and Pumbaa.... MY GOD. I was excited because they made a series spinoff from Lion King but Timon and Pumbaa was SO retarded and so unlike Lion King. Plus several of the eps were sexist.
Dora the Explorer. Ok, one of my secrets is that I watch Nick Jr. shows ^_^;. Anyway, Dora really hurt my head. She goes, "Can you find the book?" It is in plain view. 10 second pause. "Oh, here is the book, muchos gracias for finding it for me!" Just to let you know, I love Bob the Builder, so nyaa. That silly Spud...
Littlest Pet Shop. I used to collect the toys so I was excited when I saw this as a cartoon, yet it sucked.