Multiverse and Friends (season 19-present)

Multiverse and Friends is a 2020 American-Canadian show created by Fred Dungles and distributed by Warner Bros. The show is based on the video game Multiverse. Created to rival The Simpsons and Family Guy, it became more of its own thing. Like Teen Titans Go!, the show takes a more comedic approach to the Multiverse franchise and makes it an adult animated sitcom with various franchises, including the ones for kids. While the first eight seasons and seasons 14-16 were well-received, seasons 9-12 being universally panned and seasons 13, 17 and 18 receiving mixed-to-positive reception, the show later took another big nosedive in quality since season 19 and it's currently universally panned and this decline is also regarded as one of the worst examples of seasonal rot and flanderization. Only time will tell if this show goes back to its former glory, if at all.

Pre-Vacation and Post-Vacation Eras (Seasons 1-10, 13-present)
The show revolves around the characters from various IPs doing wacky and random stuff while also living in a house and they enjoy staying with each other.

Vacation Era (Seasons 11 and 12)
The crew decided to go on a summer vacation to Italy to have fun.

IPs used in the show

 * The Owl House (since season 1)
 * Winx Club (since season 2)
 * Wild Kratts (since season 2)
 * Family Guy (since season 1)
 * Amphibia (since season 1)
 * SpongeBob SquarePants (since season 1)
 * The Loud House (since season 1 (some characters from seasons 1 to 16))
 * Persona 5 (since season 1)
 * The Simpsons (since season 1)
 * Danganronpa (since season 1)
 * Hilda (since season 1)
 * Total Drama (except Pakithew Island and The Ridonculous Race spin-off characters) (since season 1)
 * Grand Theft Auto IV (since season 1)
 * Regular Show (since season 2)
 * Steven Universe (since season 1)
 * Inside Job (since season 5)
 * Blue's Clues (since season 1)
 * Super Mario (since season 1)
 * EarthBound/Mother (since season 2)
 * Tekken (since season 4)
 * Glitch Techs (since season 17)
 * South Park (since season 17)
 * Grojband (since season 18)
 * Randy Cunningham: 9th Grade Ninja (since season 18)
 * Pop Team Epic (since season 18)
 * Milo Murphy's Law (since season 18)
 * The Fairly OddParents (since season 19)

Why It Doesn't Have Friends Anymore
UNDER CONSTRUCTION
 * 1) Much like seasons 9-12 of the show but probably worse, the core problem with these seasons is that they lack the charm and cleverness of the first 8 seasons, seasons 14-16, and to some extent, 13, 17, and even 18. In one of the biggest examples of negative-180s in television, the writing was downgraded again from funny, clever, amazing, unique, serious, awesome to absolutely atrocious, catastrophic, lame, nonsensical, indolent, stale, repetitive, inconsistent, lackluster, and so on, almost to the point of irredeemability. The worst part is that the budget became bigger than seasons 9-12, as it is 50 million dollars and there are 130 writers in the show, which are extremely impressive for a show and yet they managed to screw up easily. The worst part is that unlike other shows that went downhill due to the writers barely having any experience, the show still has the same writers but they were pressured by Warner Bros. due to them treating the show as a cash cow along with The Crazy-Ass Group Show.
 * 2) Most of the characters are heavily flanderized and are even worse than in seasons 9-12.
 * 3) Anne Boonchuy (Amphibia) suffers from the absolute worst flanderization of the entire show and possibly one of the worst flanderizations of all time, as she went from a girl who was initially rebellious and self-centered but later getting a massive character development that made her incredibly likable into an abusive, malicious, idiotic, bratty, short-tempered, gullible, egotistical, selfish, rude, moronic and cruel jerk who causes a lot of misery to the people close to her and never cares about her best friends (in one episode, she even said if she would be asked to sacrifice Sasha and Marcy for fun, she would have accepted it) and is no different than Peter Griffin's flanderization. In addition, she became more of an alcoholic person who would often drink beer (even when driving) and often insults the crew whenever she gets drunk.
 * 4) Marcy Wu (Amphibia) also suffered from the absolute worst flanderization of the entire show and one of the worst flanderizations of all time, as she went from an oblivious yet smart, geeky and friendly girl to a dominatrix wannabe, cruel, moronic, psychopath, and a dominant girl who has absolutely no care for anyone and often treats Anne and Sasha like absolute trash. Granted, they weren't much better than her, but the way she treats them is worse than Anne's treatment. She's also dominant on various people, most notably Sprig, Polly and Hop Pop.
 * 5) Sasha Waybright (Amphibia) went from one of the greatest examples of character development along with Anne to a pretentious, self-absorbed, egotistical, selfish girl who often sacrifices everyone for her own benefits, even if it means hurting the loved ones.
 * 6) Even though she was flanderized in season 17, Luz Noceda (The Owl House) became even worse since season 19, as she became even more selfish and more egotistical than before, and she's also absolutely moronic
 * 7) They've added more anime characters besides Popuko and Pipimi, and many of them are badly flanderized.
 * 8) * This show's equivalent to the "Hated 8", the "Anime Annoyances", had all of its members be nothing like their original counterparts.
 * 9) The plots became a lot more nonsensical and stupid, even for adult animated sitcom standards, due to these having stale jokes and recycled plots.
 * 10) Much like the current seasons of The Loud House, the show doesn't know how to handle its focus on the characters anymore.
 * 11) One of the main complains is that there are way too many episodes focusing on the characters of Amphibia (more specifically Anne, Marcy and Sasha) and The Owl House, to the point that sometimes, other characters outright disappear in certain episodes. Unlike The Loud House with Lincoln, which makes sense that he's getting many episodes, since he's the main protagonist of the show, this show was never meant to have a protagonist, as everyone should have equal amount of screen time. And considering how badly butchered said characteres are, it makes the issue even worse.
 * 12) Lincoln and Lori Loud, Clyde McBride, Ronnie Anne and Bobby Santiago, Stella, Zach, Liam, Rusty, and Sid Chang don't appear at all in these seasons. There is not a single mention of them during these seasons, and nobody even asks if they're ok in the camp. This is due to them now appearing only in the spin-off A Loud Camp.
 * 13) The show is also notorious for baiting various ships without making them canon
 * 14) The most infamous example is Marcanne (Marcy x Anne) from Amphibia, which was listed among the most popular ships ever but the show never makes it canon and instead even trolls fans of this ship and overrelies on queerbaiting, which pissed off a lot of fans of this ship. Despite that, their relationship is still pretty good.

Redeeming Qualities

 * 1) Not all characters are flanderized, and some characters are still good.
 * 2) The Fairly OddParents
 * 3) Timmy Turner
 * 4) Cosmo and Wanda
 * 5) Chloe Carmicheal (became much better than her counterpart from the original show)
 * 6) Jorgen Von Strangle
 * 7) Chester McBadbat
 * 8) A.J.
 * 9) Vicky
 * 10) Tootie
 * 11) Trixie Tang
 * 12) South Park
 * 13) Stan Marsh
 * 14) Eric Cartman
 * 15) Kyle Broflovski
 * 16) Kenny McCormick
 * 17) Wendy Testaburger
 * 18) Randy Cunningham: 9th Grade Ninja (only 2 good characters)
 * 19) Randy Cunningham
 * 20) Theresa Fowler
 * 21) Grojband (only the 4 main characters)
 * 22) Corey Riffin
 * 23) Laney Penn
 * 24) Kon and Kin Kujira
 * 25) There are still plenty of good episodes, such as:
 * 26) *The Fairly Odd Return (which started these seasons on a high note and the only good episode of bringing other medias)
 * 27) *The Greediest Game Ever
 * 28) *Trixie Tang's Days

UNDER CONSTRUCTION

Season 19

 * Anne's Birthday (which started the downfall of the whole show and is commonly considered to be one of the worst episodes of the entire show)