Jimmy Neutron was one of those shows you watch it because it was on and that was it. I think the show is mediocre and the movie did well because Nick really market that movie all over the place. It did had it's moments, but the CG does show it's age (early-mid 2000's).

CN and Nick have plenty of shows from the 90-00's that most people don't remember and only watched because it was on.
Stuff like Whatever Happened to Robot Jones, As Told By Ginger, A Pup Named Scooby Doo, the later seasons of PPG and Dexter's Lab, Cow and Chicken, Chalkzone, The X's, Time Squad etc.
(I'd like to say that I loved WHT Robot Jones, Time Squad, and Chalkzone, but I can't remember if they were actually good :lol)

I think G1Transformers aged pretty well. I enjoy it every day. I DVR it on Discovery Family. XD Yes, there are the obvious animation flaws, but it's still good to watch. I thoroughly enjoy it. :lol

I feel like compare to the later TF shows, I feel like G1 is not that good. It's not the worst TF show, but I don't think nowhere as great as most fanboys make it out to be. I feel like the 1986 movie is still pretty good though.

Yeah, but remember this?

https://www.youtube.com/watch?v=kuDiRuYqykw

G1 is the MMPR of Transformers.

Still it,GI Joe and Jem were way better than most kids shows of the 80s imo so I'd say it has aged well considering.

Megas XRL still holds up to me despite me being a teenager when it came out. I still find Space Ghost Coast to Coast to be awesome even though some of the jokes are bit dated.

Megas XLR is still pretty good, I'd say.

I decided to rewatch old episodes of Yu-Gi-Oh: Duel Monsters and the anime has not aged that well. I was 11 when Yu-Gi-Oh was big in the early 2000's, so the series came out during the end of my childhood and I do have nostalgia to it to a certain degree.

I feel like Yu-Gi-Oh Duel Monsters has a lot of filler and way too many two or three parted episodes. The episode of Kiba's Blue Eyes White Dragon could have been done better in a shorter amount of time and not a three part episode. Not to mention the dub is pretty bad and the animation is not even that great by early 2000's standers. I feel like the Yu-Gi-Oh manga holds up better in my opinion.

Reboot is a show that's aged very well, there's a lot of adult humour and sci fi references that I didn't catch when I watched it at that age.