I think it was a spin-off of the 90s Fantastic Four cartoon. All of the Marvel superhero cartoons from the 90s seemed to be part of a shared universe. The 90s Spider-Man cartoon had cross-overs with the X-Men, the Fantastic Four, and Iron Man, and the Fantastic Four crossed-over with the Hulk cartoon. So if the Silver Surfer cartoon seems similar to the 90s X-Men, that's probably why.
There's a Silver Surfer cartoon? I must say I'm surprised. He's hardly ever been the most reliably popular Marvel character. Well loved, but not by enough.
I dunno, he was pretty popular back in the day. I mean, he had his own solo series, and he was a founding member of the Defenders. Not bad for a character that Jack Kirby created as an afterthought."Hey, Jack, who's the guy on the flying surfboard?"
"Well, I thought that someone as important as Galactus would probably have a herald of some kind."