2013

This season introduced the pointless new character, Sparky, who nobody wanted or asked for. He was so hated, that the next season completely removed him without any explanation.

This season introduced many new (usually one-time) characters, who were created for the sake of a cheap story. Many of these roles could have easily been taken by already established characters, ones that were severely underused in this season. Episodes like "Finding Emo", "Lame Ducks", "Love at First Bark", and "Desperate Without Housewives" have just a few examples. Not to mention, a few new random background characters have also been added in Dimmsdale Elementary School. They, too, serve nothing other than to provide scenery. The same trend happens throughout Season 10. Any of Timmy's friends and classmates could have easily hold that position and there wouldn't have been a single difference.

Much of this season lacks any originality, as about 50% of the episodes lazily reused plots of episodes from the previous seasons in some way, shape or form, even if they have minor differences, while also watering down the charm and cleverness of the episodes that they try to be like in question. For a complete list: "Fairly OddPet" is a version of "Fairly Odd Baby" from season six, except this time, it replaces the concept of babies with dogs. "I Dream of Cosmo" is "Genie Meanie Minie Mo" from season four, but instead of Timmy and Norm the Genie, the main focus is Timmy's Dad and Cosmo. "Dumbbell Curve" is a version of "Pipe Down" from season three, except it replaces the concept of silence with idiocy. "Force of Nature" rehashes "Talkin' Trash" from season five. "Anchors Away" rehashes "Mother Nature" from season three. "Finding Emo" is "Emotion Commotion" from season four. It also introduced a pointless Mary Sue replacement of Trixie Tang named "Missy", who served as a generic and bland love interest plot device for Timmy. However, she was a one-time character and never appeared again. Speaking of Trixie, both she and Tootie have no physical appearances whatsoever in this season. "The Bored Identity" is "Action Packed" from season two, but with Timmy's Dad being the main focus and his son as a supporting role. "Turner Back Time" completely rectons "Which Witch Is Which?" from season three. "A Boy and His Dog-Boy" rehashes "A Dog's Day Afternoon" from season one, except without the mind/body switching concept. "Crock Blocked" is "Timvisble" from season two, except that Crocker is the one who turned invisible and not Timmy. "Tons of Timmys" rehashes the Oh Yeah! Cartoons short, "Too Many Timmys"."Let Sleeper Dogs Lie" completely retcons "The Origins of Denzel Crocker" from season three for the sake of shoehorning Sparky onto Crocker's backstory, portrays all of the characters (including Crocker himself) into complete morons, and it has a nonsensical story. "Desperate Without Housewives" is "Love Struck!" from season three and that episode itself is no better. "Jerk of All Trades" (while not taking elements off any episode from the previous seasons) is "SpongeBob, You're Fired!" from season nine of SpongeBob SquarePants. It does not help that the aforementioned SpongeBob episode aired several months prior and that episode itself is no better. "Turning Into Turner" rehashes "Presto Change-O" from season five, except without the mind/body switching concept. "The Wand That Got Away" is a clone of yet another Oh Yeah! Cartoons short, this time being “Where’s the Wand?”. "Man's Worst Friend" is a version of "Anti-Poof" from season seven due to the easily predictable eventual introduction of Sparky's anti-counterpart, Anti-Sparky.

Almost all of Vicky's headgags in the intro for this season lazily reused all of the ones from season one, which are the toilet, fire hydrant, walrus, octopus, and parrot headgags. The toilet headgag, in particular, is repeated nine times in a row. The only new headgag is Sparky, albeit two different versions, the other of which is Vicky being fully turned into Sparky. Nevertheless, both of the Sparky headgags in combination are repeated nine times in a row like the aforementioned toilet headgag.

Da Rules were constantly broken in this season, such as Sparky trying to date Peaches despite her being an earth dog in "Love at First Bark" and Jorgen forcing Poof to become the godparent of Mr. Crocker's mother despite her being too old to have a fairy godparent in "Fairly Old Parent".

Three episodes in this season have have beyond moronic plot lines because they were clearly made to shoehorned in Timmy's Dad and/or Mr. Crocker: "I Dream of Cosmo", aside from being a downgraded version of "Genie Meanie Minie Mo", serves no purpose other than to be build jokes out of Cosmo and Mr. Turner." Desperate Without Housewives", aside from being a pointless rehash of an already bad episode, "Love Struck!", is literally nothing more than to force in jokes out of Cosmo, Timmy's Dad, and Mr. Crocker as they hang out together in the Turner household alongside Timmy himself." Fairly Old Parent" is not only another example of Da Rules basically reduced to a plot device for story's sake, as stated above in S9#5, but also to give Mr. Crocker's mother the spotlight as needed, while also forcing in stereotypical old people jokes.

Several missed, really good opportunities to use Anti-Cosmo/Anti-Wanda, especially in "Scary GodCouple" and "Man's Worst Friend". Instead, we get the Anti-Fairy Council and the Grim Reaper. Anti-Sparky wasn't too great either. Likewise, it can also be said as a negative for this season that Foop continues the bad trend of always appearing without his parents, Anti-Cosmo and Anti-Wanda, after his debut episode in season seven. This becomes really forced in this season with the introduction of the Council and the Reaper, and this trend continues into season ten as well.

Remy Buxaplenty does return in one episode, that being "Country Clubbed", but his entire character has been completely retooled.

In the episodes focusing exclusively on the Squirrely Scouts ("Dinklescouts" and "Dimmsdale Tales"), Chester, A.J., Sanjay, and Elmer have almost no lines, yet there is another random kid character who gets almost all of the lines. The same thing happens throughout season ten ("Girly Squirrely", "Space Cadad" and "Goldie-Crocks and the Three Fair Bears"), except only that time around, the four boys altogether have been swapped out for four random kids, including the aforementioned kid character from both "Dinklescouts" and "Dimmsdale Tales".

Poof starts to speak in "School of Crock" and later followed by "Fairly Odd Fairy Tales". However, that plot line barely had any time to play out, since he still continued to be inexplicably absent even after that.

Repetitive and forced pop culture references, especially Scooby-Doo ones. The episode "The Wand That Got Away" has the highest number of Scooby-Doo references in this season.