Some more CN rare bumpers and promos that exist 

I think I DO remember the The Looney Tunes Show and some of from The Amazing World of Gumball bumpers considering they were in the tail-end of the Check It 1.0. era. Not the Generator Rex ones though.

cool video

1:57 What was that?! It’s my tummy

Man life was simple during these eras of Cartoon Network

Where did you find that Looney Tunes show stay tuned bumper?

But is Rare

What's the rarest bumper ever

Thanks For Rare Of Michu127 & Me (Mr. Bean Movie) For Credits.

Rare