Dragon Quest Monsters Joker, in a huge, huge, HUGE way.
Dragon Warrior Monsters 2 may, in fact, be my single most beloved game of all time. I consider it to be practically the pinnacle of monster-raisers. Huge variety of monsters, fun monster families such as zombies and demons, and a rad breeding system that allowed you to make almost any sort of monster you imagined. Every monster had their base stats and resistances and whatnot, but the breeding system was done in a way so that, unlike in Pokemon, tiers practically didn't exist. With enough breeding, you could literally make ANY monster a powerful and viable member of your team. Do you like the basic Slime more than the evil demon king Deathmore? Raise a Slime of the gods and show them who's boss! So naturally, when I heard there was gonna be an installment on the DS, I was happy as hell.
But, to be frank, it's complete shit.
They fucking gutted the games of every awesome aspect that made them what they were. Almost all of the monsters from the older installments had been hacked out, replacing them with a bunch of guys from Dragon Quest 8 and the more famous ones instead. But even the cool ones that made it into the games weren't spared, because they implemented tiers, and in the worst way possible. They actually gave the monsters RANKS to distinguish the powerful from the weak, and you are constantly encouraged to breed your monsters into higher-rank monsters because THEY'RE SO MUCH BETTER. The stat differences between the ranks? Immense. And, predictably, every remotely cool and interesting monster was made to be a "low-rank" monster, and not worth using for long throughout the game. It is possible to make a good F or E-rank monster, but it takes a massive, concerted effort that could wind up taking the entire story mode (I know: I beat it with a team consisting of a Crabid, Mummy Boy, and Dragonthorn purely out of spite for the horrible rank system). Oh hey, there's wi-fi too! Except the only teams on it consist entirely of the most powerful, most boring monsters. And final bosses. Wi-fi is basically a huge clusterfuck of final bosses beating the piss out of each other.
Overall, Dragon Quest Monsters Joker is not just a mediocre letdown of a game, it's a goddamn insult to my favorite game of all time.