Zoids: New Century, also known by the Japanese title Zoids: New Century/Zeronote read as "New Century Slash Zero", is the second anime in the Zoids franchise. Originally based on model kit toys, the anime series adds new characters and plot to the toy line, as well as acting as thirty minute toy commercials. Only vaguely related to its nominal predecessor Zoids: Chaotic Century, New Century avoids Chaotic Century's dramatic war setting in favor of a Tournament Arc flavored series. The heroes take part in zoid battles, a futuristic Mecha version of gladiator games where teams of zoids fight each other for prestige and cash prizes. These battles are overseen by the Zoid Battle Commission, which enforce the rules of the sport via satellite-deployed robot Judges that act as referees — whose decisions are backed by the Commission's Kill Sats when necessary. Naturally, this doesn't stop the heroes from fighting bandits and other criminals outside the Commission's jurisdiction, or prevent unscrupulous warriors from hijacking matches and forcing legitimate competitors into dangerous "unsanctioned battles".The series revolves around the Blitz Team, a veteran but relatively low-ranking group of zoid warriors. During a match, they encounter Bit Cloud, a wandering junk dealer who specializes in salvaging parts from zoid battlefields. Bit turns out to be able to pilot the Blitz Team's Liger Zero, a zoid previously impossible to control, and Bit promptly joins the team. The series proceeds from there in grand shonen style, with the Blitz Team fighting battles, gaining rivals, learning about the Liger Zero's mysterious nature, and becoming embroiled in the Zoid Battle Commission's conflict with the shadowy Backdraft Group.
Always Someone Better: The Lightning Team, notable for being the only team to defeat the Blitz Team during the series.
Their second encounter goes decisively in the opposite direction, however.
Animation Bump: The animation in New Century is the best in the entire Zoids franchise, though a few battles stand out from the rest of the series, such as the Liger Zero vs. the Red Blade Liger, and the Liger Zero vs. the Berserk Fury.
Back-to-Back Badasses: Well side by side, anyway — Leon and Bit when they take on the Backdraft Group after their battle is interrupted.
Black Box: The Liger Zero has one, prompting a baffled reaction from the mechanics that discover it.
Blood Sport: They're robots, so there's no actual blood, but that's still basically what zoid battles are.
The Backdraft Group reuse the magnetic field poles seen in Chaotic Century once or twice.
Moonbay's Gustav appears in the background of episode 23, complete with the single white replacement armor panel and the booster rockets that make it visually unique by the end of Guardian Force.
In the final episode, the charged particle cannon used by the Backdraft Group to destroy the judge satellites is the tail of the Death Stinger, the major threat from the second half of Guardian Force. In addition, the final battle between the Liger Zero and the Berserk Fury takes place on top of the wreckage of the gravity cannon-equipped Ultrasaurus from Guardian Force's finale.
Empathic Weapon: Liger Zero seems to be unique in that it can respond to Bit and operate autonomously, in addition to not having allowed anyone to pilot it until Bit arrived
Every Man Has His Price: The Blitz Team is regularly offered multiple times the normal prize money in order to persuade them to accept battle invitations. Harry Champ and Dr. Laon use it to get the Blitz Team in particular to accept challenges, while the Backdraft Group uses it as incentive for teams to fight them rather than run away when they take over a battle. Dr. Toros even uses it on his own team at least once, offering them extra pay to fight battles they normally wouldn't.
Facefault: Happens to the Tigers Team early in the Royal Cup. Newly renamed the Zaber Fangs, the Judge accidentally announces them as the Fuzzy Pandas Team, prompting their zoids to facefault... which freezes their combat systems. While the pilots scream bloody murder, the Judge quickly declares the Blitz Team the winners and retreats to his judge capsule.
Limited Wardrobe: Of a sort. Most characters get at least two outfits: a "casual" one that's their normal day-to-day wear, and a "piloting" one that they use when going into battle. Main characters also get a "swimwear" outfit during the Beach Episode and Hot Springs Episode, and a "sleepwear" outfit seen when they get woken up in the middle of the night.
Mecha Expansion Pack: Most noticeable with the Liger Zero and its armor components, but other examples such as Harry's Dark Horn and Leena's Gun Sniper also exist — we just never see those zoids without their expansion packs.
Manchild: The Doc is alarmingly childish for the nominal leader of the team. He loves playing with models of zoids (and sometimes prefers that to paying attention to actual matches), and has a tendency to judge the value of things based on how cool they are. (The Blitz team ended up with both the Liger Zero and its Mecha Expansion Packs because the Doc thought they were awesome, rather than for practical reasons.)
Mid-Season Upgrade: The Gun Sniper for Leena, the Raynos for Jamie, the Blade Liger for Leon, and the Shadow Fox for Brad. Notably, Brad, The Lancer, is the last to get an upgrade. Quite as notably, Jamie's was forced upon him.
Nebulous Evil Organisation: The Backdraft Group. They seem to be primarily a gambling ring that caters to rich, powerful clients who enjoy "high stakes" battles with no safety rules — but then, how does overthrowing the Zoid Battle Commission fit in to that?
Nobody Can Die: Despite dealing with giant robot Blood Sports in mecha that equip Wave Motion Guns and are capable of Macross Missile Massacres, and dealing with certain villains that are actively disdainful of the usual rules for pilot safety, no one in the series is ever injured past the point of becoming a Bandage Mummy for a few scenes, much less actually killed. Hell, not even the zoids get that badly damaged — they are only about three examples of a zoid being damaged beyond repair in the entire series.
Pity the Kidnapper: When Leena is kidnapped by the Backdraft Group. Their video call ransom demand is repeatedly interrupted by Leena fighting with her captors, and she eventually escapes (thoroughly trashing their base in the process) on her own anyway. Polta, the one negotiating the call, puts them on hold to subdue her during it, and returns visibly worse for the wear and without any actual success.
Plank Gag: Combining this with a Coincidental Dodge enables Bit to unintentionally rescue Naomi Fluegel from two thugs by brutalizing them with a large pipe. He's confused as to why they are unconscious afterwards. Maybe.
Naomi: Is this guy totally zoned out or did he do all that on purpose?
Ramen Slurp: Doctor Layon and the Tigers Team both do this occasionally.
Rank Inflation: Teams in the Zoid Battle Commission are divided into "classes" to prevent mismatches; teams can only challenge other teams within their class. The classes are alphabetical ("B" class is higher than "C" class, with "A" class higher than that), except for the highest, "S" class — which cannot be earned by normal means, but is only available to winners of the prestigious Royal Cup tournament.
Selective Obliviousness: Harry is entirely incapable of noticing the fact that Leena has zero romantic interest in him, no matter how obvious it is to everyone else.