Young Johnny is gung-ho and full of courage. Johnny's brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream it up, Johnny will do it; as long as his genetically engineered super dog, Dukey, can come along.
Honestly this show is amazing... well the first 3 seasons are. The first season is honestly the best out of all. The animation is smooth, the characters are funny, the intro is really good and there are absolutely no whipcracks. The second season is amazing too, but not as amazing as the first season. For starters, from this season on, because the production studio changed from being produced in-house at Warner Bros, to being produced in Canada at Cookie Jar, the show is animated in Flash, and while that is absolutely not a bad thing (if you know how to use it), I mean, look at Total Drama, it does look pretty choppy at times, ad some of the characters do look pretty bad when translated to flash. In my opinion, a good example is Dukey. The characters remain basically unchanged, Hugh is still the best character. Another problem starting with this season is the reuse of topics. There are at least 3 Johnny X episodes in season 2 alone. Season 2 also introduced the whipcrack sound effect, but it is nowhere near overused in this season. I'd say it's only used once to thrice per episode. Another introduction to this season is the new theme song that will be used for the rest of the series, and it is literally a copy of American Idiot by Green Day. Season 5 is where it starts to get bad. Really bad. For starters, there is a new title sequence (a theme song is the music, the title sequence is the animation), which is honestly pretty lazily animated because this season had the production studio change again from Cookie Jar to Atomic Cartoons, ad the show is still being animated in Flash, but from first glance, there isn't a difference, but this season is where the show gets horrible, not only because the characters start to get flanderized, but because this season is where the aforementioned whipcrack sound gets really overused, to the point where in the 100th episode special, "Johnny's 100th Episode", the episode has the series record for whipcracks at nearly 200. In my opinion, this show is one of, if not, THE definition of "falling from grace".