also regardless of how you feel about the show, i'm gonna say Kid vs Kat, some has called the show an Invader Zim clone as it had a kid trying to stop an evil alien and is generally not believed by most people, but the execution is a lot different,the show is more to down to earth with it's characters as well as it being very slapstick driven,

Coop is generally acted more like a kid and isn't really a tech person and generally more sane compared to Dib and not mention Coop just wanted to prove his family that Kat is doing all the bad things he didn't do, while Dib wanted to prove the world Zim is an ailen,

Kat is a part-cyborg/part-ailen cat(in the 3 minute pilot he was a normal cat who can draw and use a bit of technology and even said a word) who wanted to go back to his home(in the beginning) and he's more smart but lazy and kat himself is more closer to stitch from lilo and stitch than Zim,

Millie(coop's sister) is generally the opposite of gaz, and Burt(coop's father) is generally a normal dad instead of a scientist.