Bishop Ladja gets considerably more screentime and involvement in the plot in The Remake than in the original. To elaborate, he's the one who petrifies you and your wife instead of Kon. Also, instead of being killed in Talon Tower as in the original, he survives to personally execute King Korol for his failure to defeat the party and ends up being fought at the entrance to The Very Definitely Final Dungeon.
Party chat will also flesh out your human party members since all of them will have something to say nearly every time you talk to someone, visit somewhere, or after an event.
Alas, Poor Villain: Not so much in the original, but in the DS version, it's hard not to feel bad for King Korol when Nimzo has Ladja execute him in an excessively brutal fashion.
And I Must Scream: The player character is stuck as a statue for eight years in DQV, as is his wife. And to make things even more horrible, you get to watch a kid grow up, and then get kidnapped. It is explicitly stated that they were aware of everything that was occurring during that time. Though, Debora in the in-game chat comments that the 10 years as a statue just flew by for her, but whether or not she was acting tough due to her personality or telling the truth is not clear.
Nera's dialogue makes it quite clear that she was not aware, not even knowing where she was during that span of time. This could mean that either the player-character was the only aware one because of his Loftinian blood, or that the player is only shown what's happening to them in order to set up plot-points for the next section of the game.
Nera has more dialogue later, if you talk to the halfling who created the T'n'T board near Fairy Lea, where she says she was aware of it, so at first she might just have been so thrown off balance that she didn't know what was going on, then pulled her mind together later.
The Anime of the Game: Manga for this matter; Dragon Quest: Tenkuu Monogatari is a 12 Volume manga, released in 1997, centered on Bianca and The Hero's children, named Sora (Sky) and Ten (Heaven) in this adaptation, adding a Theme Naming for the Heavenly Bride title of the original game. It serves more as an Adaptation Expansion for the children, since they venture through many original adventures not present in none of the games while their parents are Demoted to Extra. Unfortunately, Tenkuu Monogatari (Sky Tales) was not released outside Japan, and has no Fan Translation to boot.
And the number can be pushed up to 8 when you have a caravan, though you can't bring it everywhere and some enemies will prevent you from swapping members. But those in the caravan still get full experience from battles.
The fact that the original cut back the limit from 4 (as in the previous two games of the series) to 3, while vastly increasing the number of potential party members via the addition of Mons to the series, was quite frustrating. The only other Dragon Quest game to restrict you to 3 active party members was Dragon Quest II... which only has 3 playable characters.
Authority Equals Asskicking: Your dad is a king of a kingdom, and later on you are also crowned king. Your son and daughter are the prince/princess of said kingdom, and your wife is the Queen. While granted, you still level up as usual, Pankraz is tough as nails at the start of the game, being able to attack twice per turn and has twice as much health as his level, and by the time you are properly crowned royalty, so are you.
Badass Family: The player-character, his wife, and their children during the endgame.
Badass Pregnant: Your spouse can be this if she's in your battle party in the mountain passage on the way to Gotha.
Because Destiny Says So: The reason why Nera and Deborah fall in love with the main character. In Nera's case, a conversation after the wedding implies that destiny flat out overrode her feelings for Crispin in favor of the main character.
Betty and Veronica: Bianca and Nera don't really qualify for this; instead, Nera and her DS-exclusive sister Debora fill these roles.
Bond Villain Stupidity: Ladja has the opportunity to easily kill the hero twice, and later the hero's wife along with him, the first while he's a child and doesn't know he's a threat yet, and the second when he turns the hero and his wife to stone and knows all too well, but in both cases decides to make a quick buck off the hero instead.
Break the Haughty: Prince Harry goes through this, what with being kidnapped (thus leading to the death of the main character's father) and forced into slave labor for ten years...
But Thou Must: Since this is from the same series as the Trope Namer, it shouldn't be surprising that it appears at some point. In fact, during the childhood section, Harry is meta as hell about this: the first time you talk to him, he'll ask you if you want to be his goon/lackey/etc. Refuse and he'll classically But Thou Must you. Accept, and... he tells you to scram anyway.
The worst one of them all is right after the first boss. He's begging for his life and forgiveness, which he doesn't deserve, seeing of course that he kept spirits from moving on for personal entertainment, and tried to have you eaten. You say no...
Ghost Boss: Oh come now. No need to be rude.
Cap: Annoyingly, many monsters have a level cap lower than that of the human characters (who all can reach level 99). However, the only way to find out in-game if they've hit it is to go to a Save Point and ask how far they have until their next level. Guide Dang It!
However, her unlucky status is subverted somewhat in the DS remake, where Bianca ends up with multiple suitors interested in her if not chosen, while Crispin ends up happily married even if you married Nera.
In either case, you determine whether Bianca becomes either a Victorious or Unlucky Childhood Friend.
The Chosen One: In an interesting twist for the genre, it's actually not the main character. It's his son.
Collection Sidequest: The PS2 and the DS versions includes Knick-knacks. Lots of Knick-knacks. Some of which can be used as equipment.
Coming-of-Age Story: The story of Dragon Quest V is a 'bildungsroman' revolving around the growth of the Silent Protagonist from a newborn to a boy, from a boy to a man, and from a man to a father.
Crutch Character: Some of the monsters, like the Rotten apple, start out strong, but they're hampered by: slow stat growth and an early maximum level cap. Ditto with Pankraz.
Cutscene Incompetence: Averted with the death of Pankraz. He doesn't get oneshotted by an attack that would normally be no problem. It plays out in the actual battle engine, with Pankraz "silently enduring" as he gets attacked repeatedly, and it takes forever for them to work through his massive HP total. It's much more epic and sadder this way, too.
The animation used for said giant instant kill fireball is also used for the Kafrizzle spell. Considering that Kafrizzle is a really powerful single-target spell (often over 150 damage, which is a lot in this game), it could potentially be just as deadly outside of cutscenes.
Also worth noting that both victims were already beaten to near death either by the party or his bodyguards.
Using the Magma Staff to clear the path to Diggery Pokery. You level a small mountain with it, but it does piddling damage in combat, since spells cast for free from items do half damage.
Deadpan Snarker: Debora at times. While talking with the critic of the Knick Knacks, party chat with your children often leads to this.
Death by Childbirth: The beginning of the game has what is basically the classic setup for this. Oh, if only it were that simple...
The Metal King Sword you can get at the Casino in Fortuna really IS the most powerful sword in the game. And you can get as many of them as you want if you don't mind a bit of slot machine grinding. Plus, a lot of people can equip the sword, even the Slime! It's stronger than the Zenithian Blade and every casino carries a unlimited number of them. With some Save Scumming, you can get the 50K tokens needed to buy one.
The Slime can become one. It can equip the Metal King equipment, and learns the Kabuff and Kasap spells early on.
Dub Name Change: Just about every named character had a name change in the localization. You can probably count the number of unchanged names on one hand.
Express Delivery: When you arrive in Gotha, your wife is pregnant but still not showing. By the time you finish a very short side-trip mission to a nearby cave, she's ready to give birth to twins after less than 2-4 in-game days unless you dawdle.
Fan Translation: Prior to the Nintendo DSRemake this was the only way to play Dragon Quest V in English. In 2002, the final SNES translation patch was released and received with much joy, and in 2010, what many thought to be impossible happened: the PS2 version got a complete translation patch, an achievement to be proud and thankful of, due how ungodly hard and time consuming is to translate and patch a PS2 game. No wonder Dragon Quest V for PS2 remains as one of the very few, and well known, originally Japan OnlyPS2 games to ever be graced with a translation patch.
Big Bad: Grandmaster Nimzo, the human turned demon ruler of the Dark World. Worshipped as a god by the Order.
The Dragon: Bishop Ladja, Nimzo's apparently Russian right hand who is more evil than his boss.
The Brutes: Kon and Slon, Ladja's personal bodyguards/enforcers.
Evil Genius: King Korol, the High Priest of the Order who manages their temple in the Human World.
Dark Chick: Queen Ferz, the High Priestess of the Order and a master illusionist.
Fourth Date Marriage: At one point in the plot, you're required to marry one of three women, two of which the hero barely knows, and the third is someone that he never had much opportunity to date (though at least he'd known her when they were children).
In perhaps the oddest example of this trope and a complete inversion of the usual Take Your Time present in this game, a series of events that can take the player roughly a couple hours to get through is implied to take two YEARSnote especially the process of meeting your prospective wives, adventuring to get their hand in marriage, getting married, and the birth of the twins. Going by plot? A year or two. Going by the game mechanic days, about three weeks at most. This happens at least twice in the game, in addition to normal story time skips. (The last era of the game is explicitly mentioned to have taken two years.)
A rather more disappointing example: the hero's son is the legendary hero, so you'd expect his stats would at least notably decent. They aren't. He is outclassed by his twin sister, a mage, in every category but Strength, and dwarfed in every category by his father (who is twenty years older, but come on, they're the same level!).
On the other side of the coin, think about all the bad fortune that befalls our hero... ambushed by Ladja, watches his dad get murdered, enslaved for ten years, has to go through trials to get married, gets turned into a statue and misses the early years of his children's lives, and then has to go rescue his mother from the underworld... and then, during gameplay, when he levels up? You'll notice his luck stat just about never goes up. His luck stat is the lowest in the game.
In the childhood section of the game, when Pankraz is with you, you can't control your movement at all, you can't choose to initiate dialogue, you can't do anything but follow right behind him on autopilot. Well, of course you can't do anything; he's your dad, he's the party leader, not you. You're a secondary party member when he's around!
In one of the most meta moments in the series, Pankraz makes the mistake every player has in a 2D RPG: accidentally stepping back onto a stairs icon and ending up in the previous screen. Jarring for him as one step sent him down an entire underground stairway and hilariously awkward for you as the party member who follows without a word. This was sadly not as funny for the remake, where there is no longer a 2D icon to fumble with on the way to Coburg.
The game actually does lampshade the fact that resurrection can happen in this setting. So, if characters get Killed Off for Real, the narrative makes sure they're either Deader than Dead or otherwise indisposed. Specifically, Pankraz is hit with a fireball so powerful it blasts him to ashes, and while the Hero and his wife aren't killed, they're turned into stone statues with a spell that only a specific staff can reverse. Even when you get married, instead of "as long as you both shall live," it's "as long as you both shall be resurrected from death in the church."
Gasshole: The ferret enemies are constantly farting, about once per second. Interestingly, while most have gas attacks, they breathe the gas, rather than using it as a form of Fartillery.
Generation Xerox: Harry's son not only looks exactly like his father, he plays the exact same tricks (telling Parry to fetch the lackey's badge and hiding down the stairs).
Gotta Catch Them All: While you can't recruit every monster in the game, you can recruit many, many more than you're likely to ever actually use. You can at least catch one palette of every monster. The Big Book of Monsters tells you what monsters can be recruited, and the chances.
Gratuitous Foreign Language: Several characters, but most notably Sancho and Bishop Ladja. Nimzo actually takes it a step further by not only talking with a Russian accent, but also using a bizarre form of Cyrillic alphabet leetspeak.
Guilt-Based Gaming: Let's not mince words: The game expects you to marry Bianca and uses every available opportunity to remind you that you really should marry your childhood friend over Flora. Among other things back in the SNES version, Bianca's father would die and you got stuck with a character who was severely underleveled and took up a party slot if you married Flora instead.
It's worse than that; Flora has gated level cap of Lv10 (normally Lv99 for human PCs) for the rest of the second generation (The hero's level would usually be around that high no more than an hour into the game, and the marriage is about 8~10 hours into the game), and would often disregard commands in battles unless another party member attacks her. Flora's in-battle behavior would also imply that she might not have loved the Hero at all, which would make the whole thing even more of a Player Punch.
It works. Most players of the Super Nintendo version, if they ever pick Flora at all, only do to see the minor story differences, then go back to the previous save and pick Bianca.
This is prevalent enough that ALL the SNES guides in GameFAQs go with the Bianca route.
Was thankfully radically changed in the DS remake: besides missing out some events or dialogues, picking a bride over the other two doesn't make anything particularly bad happen.
Have You Seen My God?: Everything starts to go wrong and the world goes to Hell after Zenithia crashes. God would step in and fix things, but gets stuck riding a minecart going in a circular route for 20 years. What's amazing is that this is almost a decade before Dogma, and it's very unlikely that Dragon Quest V could've influenced it.
Heroes Prefer Swords: Subverted with the main character, as he's shown wielding a staff both in his sprites and in official art. When you consider that the heroes of the other eight games are all depicted as swordsmen, this could be foreshadowing the fact that he's NOT the hero! . . . At least, not the LEGENDARY hero. Despite this detail, the story is still centered around him and he is classified as a Hero by many sources and wikis.
Most of his weapons are still swords, though.
Averted in his special weapon, the dragonstaff. He's the only one who can equip it, it's only a little weaker than the Metal King sword, and in later works, he can be seen wielding it.
Hello, Insert Name Here: Along with naming your hero, you can rename your recruited monsters. You get to name your kids, too.
Heroic Mime: The protagonist is silent like nearly all other Dragon Quest games. However, Dragon Quest V subverts this trope by later revealing that the Silent Protagonist is in fact not the supposed Legendary Hero, but that it is his rather talkative son.
There's also the fact that early on in the game, when you meet your future self, he's not silent. Neither is your younger self when you meet him later in the game.
If you take Debora to the hot springs in Stockenbarrel and use Party Chat, the Hero will 'talk'. It's just '.....', but he doesn't like the heat.
Hopeless Boss Fight: The very first fight against Bishop Ladja. He actually secretly regenerates about 200 HP per turn, which is far more than (most) characters can deal at that point in the game. Even if you manage to beat him, the game continues as if you lost. And besides, once the main character dies, the battle ends.
Kon starts out as this. You can only do 1 point of damage, even with the Disc One Nuke. Just guard for three turns.
Hey, Hero! Your mother's alive and waiting to be saved! Oh wait, you just meet her and she just got Kafrizzled by Ladja... But she survived! Only to get zapped by Nimzo... Ow.
Hey, Hero! You just got married, got the shield that your father searched for, and just became king with two heirs! Oh...your wife has been kidnapped. You rescue her, but then you and your wife got changed into statues, and sold off. Ouch. Oh...you got bought as a gift to newborn, who you watch grow up and get kidnapped. It just keeps going...
Improbable Age: The hero starts his adventuring career at six. His children, on the other hand, wait until the ripe old age of eight.
Just a Stupid Accent: Sancho's accent implies that his native language is Spanish, but aside from in the Spanish translation of the game (for obvious reasons), he never speaks it in full sentences. Bianca's accent dings this for some people, as well, slipping between British-English and Australian.
For the record, Sancho uses Mexican Spanish in the Spanish translation.
Villagers of the small village called Hay speak with a Texas drawl, in a way that it's too painful to read or to understand at all. Granted, even in the original, they were kansai to a ludicrous degree.
Subverted in the case that you're traveling the world, and meeting many different people with many different accents. Of course you're going to run into some people you can't understand thier accents.
Last Girl Wins: Nera/Flora in the original, either her or Debora in the remake.
Lost Forever: In the SNES version, you can never return to the Ice Mansion or Dwarf Cave in the Fairy Realm after Powan/Treacle uses the Flute/Beacon of Spring, so any treasures left behind are Lost Forever. Averted in the PS2 and DS remakes, where you can explore the realm again after going through the Lost Forest in the third generation.
A few of the monsters that can hit level 99 have extremely high stat growth and/or learn incredibly powerful abilities at the highest levels. To little surprise, slimes are one of them.
The three brides count as well. Each one starts out filling a niche party role, but at the highest levels, their stat growths in other areas catch up and they wind up being differentiated only by what equipment they can use. For example, Debora can use stronger weapons, like the Hera Hammer.
Dr Agon is actually the Zenithian Dragon. With a name like that, who saw it coming?
The Canon Names for the hero and his children count: Madason is the son of Mada, while Parry and Madchen are derived from their grandparents Pankraz and Mada.
Mini-Game: Tons, especially in the DS remake. Slots, poker, the monster arena, the slurpodrome, the tombola drawings, the "Bruise the Ooze" machine in Debora's room, and especially the T'n'T boards, the last of which is monstrously complex and very aptly termed "Stark Raving". All are optional.
Mirror Monologue: By looking into a mirror, a character will interact with it. There's a different reaction for each character, so use Line-up under Misc. in the start menu to mess around different characters.
Obstructive Foreground: Common in certain maps and locations for the original SNES game, happens in dungeons and cities which had long invisible corridors inside of what would appear to be normal walls (A example would be the Gotha Castle, having a secret door right to the priest), the simple 2D maps will confuse players during their first stay in the area; the Nintendo DS and PS2 versions avert this by having more detailed maps and camera movement.
Official Couple: The main character/Bianca since all official deceptions of Parry and Madchen (or Ten [Heaven] and Sora [Sky] in the manga adaptation) have them with blonde hair. In the game, they have blonde hair only if their mother is Bianca. Also, all versions of the game (SNES/PS2/NDS) features just the Hero and Bianca in the cover, some variations only add their kids and Pankraz/Papas.
The commercials for all three releases prove this. 
And the characters in the game nudge you like crazy to pick Bianca as your wife. The crazy thing is, the Ship Tease continues, even after you marry Nera or Debora.
As is the norm for the Dragon Quest series and RPGs in general, but it's funny to give Bianca back the same clothes & armor that she wore as an 8 year old when you next meet her again as an adult or to swap armor with your own son.
Also used in-story for Zenithian helmet, which resizes itself to fit the Chosen One.
Perpetual Frowner: The Hero, as an adult, in the PS2 version, despite having shown all kinds of gentle expressions in official art, his 3D model for the game looks quite angry most of the time. Given his past...
The PS2 release: complete overhaul with 3D graphics, expanded background on some characters, allowing four characters in the same party instead of just three, new monsters to fight and recruit, and the addition of a local trinkets museum where the player has to collect local specialties from all around the world, return the items back to Yuujii, and receive rewards for them.
The Nintendo DS release: it got all extras from the PS2 version minus the complete 3D graphics engine, but the most valuable addition was the introduction of Debora, a new possible bride for the hero.
Rich Bitch: Debora, who may or may not have a golden heart under all that jewelry. She spends about 90% of the marriage being an ungrateful, insane slave-driver not unlike those that imprisoned the Hero earlier, but by the time she witnesses for herself the final major tragedy in his in-game life, her tune changes and she vows to make Nimzo pay for what he did to her husband.
Also slightly played with, due to the fact that said royals leaving tends to result in a kingdom not doing too well when they're gone, and many characters questioning whether taking off and leaving the kingdom without a ruler is a smart thing to do when they have so many subjects already willing to help.
Prince Harry's half-brother, Wilbur, never wanted to be king, but his mother orchestrates Harry's kidnapping, forcing Wilbur onto the throne so she can be Queen Dowager. When Harry returns ten years later, Wilbur is desperate to hand it over to him, and is completely stunned when Harry refuses.
In Gotha, Albert only rose to the throne after his elder brother disappeared; though he has done a far better job than Wilbur, he's still a Reluctant Ruler who immediately tries to hand the reins over to the just-arrived heir, despite the fact that his newly rediscovered nephew has only just learned of his Secret Legacy and has had about zero training as a ruler. Which may help further explain why his first act as ruler is to promptly disappear for ten years.
Theme Naming: The official English translation of the DS remake gives several villains chess-related titles, such as Kon the Knight, Slon the Rook, and the final boss, Grandmaster Nimzo, who is named after a real-life grandmaster of chess (see Shout-Out). Allies of theirs that are just Palette Swaps of randomly encountered enemies follow the naming pattern of (name of non-Palette Swapped version) Pawn.
The chess motifs for the villains are even more subtle than that; the proper names are the names of the chess pieces in Russian. Kon means knight, Ferx means queen, and Korol means king. Averted, however, with Slon the Rook and Ladja the Bishop; while 'slon' means elephant in Russian (and would therefore seem like a good name for a rook), it's the Russian term for the bishop, and 'ladja' is the term for the rook.
Zugzwang is also a chess-related term; it means a situation in which all one's possible moves are bad.
The Unchosen One: The unnamed Hero of Dragon Quest V is obviously not "The Chosen One", but the actual Prophesied Hero still looks up to him for guidance and support, because while Parry is a clever kid, he's still just a kid, and every kid needs help from his father from time to time.
Add Sancho to your party, then take him back to the first few cities of the game and talk to him constantly. How cruel you're being varies from city to city: in Roundbeck he occasionally gets depressed but also has untainted happy memories, in the ruins of Whealbrook and at Coburg your kids make it clear to you that Sancho refused to ever go to either place again until the Hero forces him to, but at least in Whealbrook after you talk to everyone he eventually seems to come to terms with what happened there. But in Coburg it's obvious that you're basically emotionally torturing him every second you stay there, because it's so hard for him to be in the place and speak with the people that he blames for Pankraz's death.
Marrying Nera in the SNES version will turn Bianca's life into a miserable hell. It's less cruel in the DS remake.
The passage from day to night takes a minute or two of real-world time (not counting time in battles).
Chapters 2 & 3 take place over less than a month of in-game day/night cycles + sleeping at inns unless you spend a lot of time grinding. However, in-story dialog suggests that each chapter takes over 2 years each. (e.g. You were rescued by your 8-year old kids, born on the day your wife was kidnapped. When you recover your wife, the game says that it's been 10 years that she was petrified.)
You Have Outlived Your Usefulness: As if to hammer the point home that the Order of Zugzwang are evil bastards, they intend to murder all of their slaves once their citadel is completed in order to cover their tracks.
Also, after Chancellor Jeeves hands over your wife to Kon's goons, they promptly murder him.
This even happens to the head of the Order himself. After he is defeated, King Korol uses his last strength to call upon Grandmaster Nimzo to send the party to the underworld, but Nimzo ignores him and Korol dies. The remakes rub salt into the wound by not only having Nimzo ignore him, but also by having Ladja appear and tell Korol that he no longer serves any purpose before incinerating him with a fireball. Ouch.