History YMMV / MonsterBloodIV

* TheyWastedAPerfectlyGoodPlot: Many feel that the concept of the slug monsters is a cool one, but is wasted by having to be a Monster Blood book.

* WhatAnIdiot: You'd think that Evan and especially Andy would learn by the fourth book of the MB series that the Monster Blood is extremely dangerous, yet they ''still'' [[TooDumbToLive use it at an attempt at vengeance.]]

* TheScrappy: Nearly all the characters from the ''Monster Blood'' books are this, with the exception of Andy and Trigger.
** Evan Ross, the main character, is a ButtMonkey like many of the other protagonists, but he's also incredibly whiny and often comes across as just plain dumb to the point of making him unsympathetic.
** Evan's parents consistently unload him on relatives that are either unfit to take care of him or just plain treat him like crap, while also telling him to suck it up. In fact, this book book opens with Mrs. Ross explaining that if Evan wants to go to summer camp, ''he'' has to pay for it.
** Said aforementioned relatives include Evan's Aunt Dee and her son Kermit. Kermit is a SpoiledBrat InsufferableGenius that spends most of his page time either using Evan as a guinea pig for his insane experiments (that almost always backfire) or getting Evan in trouble just to see him either punished or beaten up (and many fans speculate that Kermit may actually make his experiments backfire on purpose just to get Evan in even more trouble). Aunt Dee lets Kermit do whatever he wants and always believes his lies about Evan picking fights, leading her to scold him and treat him like crap.
** Finally, there's Conan Barber, a horrendous example of one of the many bully characters in the series. Conan only seems to exist for the sake of making Evan's life even more miserable, has no redeeming qualities, and almost never receives any punishment for it. You'd think after Evan saves his life at the end of ''Monster Blood II'' Conan would leave him alone, but he still beats Evan up whenever he can. With some many unlikable reoccurring characters, it seems to make more sense why an entirely brand new protagonist was created for ''Monster Blood for Breakfast!'' in the ''Horrorland'' series.
* TheyWastedAPerfectlyGoodCharacter: Andy was far more likable than Evan Ross was and many readers wished that she'd been the main character. There were four ''Monster Blood'' books in total during the main series, but Andy was just a supporting character in all four of them. This is especially true in the last two, where Evan's cousin Kermit becomes a primary character and Andy's practically DemotedToExtra. And then, for ''Monster Blood for Breakfast!'' in the Horrorland series, an entirely new protagonist was created with none of the original ''Monster Blood'' cast returning.
* TheyWastedAPerfectlyGoodPlot: Most people agree the concept of the slugs is a fine one, but it's brought down by being forced to be tied to the ''Monster Blood'' saga.
* WhatAnIdiot: You'd think that Evan and especially Andy would learn by the fourth book of the MB series that the Monster Blood is extremely dangerous, yet they ''still'' [[TooDumbToLive use it at an attempt at vengeance.]]

* TheyWastedAPerfectlyGoodCharacter: Andy, as mentioned in the EnsembleDarkhorse section, was far more likable than Evan Ross was and many readers wished that she'd been the main character. There were four ''Monster Blood'' books in total during the main series, but Andy was just a supporting character in all four of them. This is especially true in the last two, where Evan's cousin Kermit becomes a primary character and Andy's practically DemotedToExtra. And then, for ''Monster Blood for Breakfast!'' in the Horrorland series, an entirely new protagonist was created with none of the original ''Monster Blood'' cast returning.

* SugarWiki/FunnyMoments: One of the cops trying to charge the kids for littering before being told to just give up.