Awesome Music: With Chikayo Fukuda at the helm for each entry, this is to be expected. Special mention goes to the vocal themes done by LieN, as well as "For Little Tail" by KOKIA (vocals and lyrics) and Yoshikazu Suo (music and arrangement). It has its own page here.
Cult Classic: It should be noted that this series is still largely unknown even when the topic of underrated games comes up, with other games like Blinx: The Time Sweeper and Kingsley's Adventure getting more recognition, but that doesn't stop small dedicated groups from expressing their love for the series whenever they can.
Memetic Mutation: Only male Felineko can be truly evil.Explanation (Major spoilers!) As of the Fuga series, fans have noticed that most major Caninu villains tend to be given a redemption arc of sorts no matter how evil they were beforehand— side-material has Bruno and Captain Grumpf survive (with the former giving up on evil and the latter outright turning good), and in the games proper Stollen and Baum are given redemption arcs while Flam Kish is revealed to have survived from the game prior. On the other hand, major Felineko villains like Fool, Kirsch from the "Kadenz" side-story, Blutwurst and Cayenne are treated as Beyond Redemption, with Fool playing the same villainous role in side-material that he did in his debut game. While there is a sort-of exception to this trend in the form of Hax's original self being treated as irredeemable (since the second Fuga game wants to make it clear his AI incarnation is a distinct Morally Superior Copy), this has led some fans to joke (or outright dread) that the third and final Fuga game will feature the Berman Kaiser being redeemed despite him being the cause of anti-Felineko rhetoric across his empire, and/or him being given a Freudian Excuse in the form of some legitimately evil Felineko villains that came before him, making him interpretable as a Well-Intentioned Extremist.
Popular with Furries: CyberConnect2 is very engrained within the kemono community in Japan, so it's only natural that the series' fanbase mostly consists of, well, furries.
Spiritual Successor: Funnily enough, what started as a Follow the Leader to Mega Man Legends ended up morphing into this following that series' fade into dormancy, with some considering Solatorobo: Red the Hunter to be Mega Man Legends 3 in all but name. It becomes funnier when you realize Hiroshi Matsuyama himself said he would be glad to take over the Legends 3 project personally had Capcom just simply asked him. Granted, this doesn't apply as much to Fuga given its completely different gameplay style.
Tough Act to Follow: Inadvertently, Solatorobo has become this for the franchise moving forward, as everyone agrees that its story was the biggest strength the game had, combining expanding lore on the series' mythos with well-written character interactions that made the world feel more alive and personal. While few will call the Fuga games bad by any means, the Anyone Can Die nature along with the development team's limited resources makes it difficult for those games to deliver a cohesive character-driven story if you weren't going after the Golden Endings, making those games feel somewhat flat compared to Solatorobo. Inadvertently, Fuga: Melodies of Steel 2 tried to bring back certain plot elements and writing styles from Solatorobo to make that game feel more closer to the chronologically modern games in the series, and wound up becoming the weakest entry in the series when it ended up clashing with Fuga's War Is Hell themes.
What Do You Mean, It's for Kids?: The games feature cutesy animals piloting cool mechs, but also feature ancient planet-busting monsters and heavy themes of faith and war. Despite this, Tail Concerto and Solatorobo: Red the Hunter were hit with E and E10+ ratings respectively. It's telling that CyberConnect2 probably got wise to this, and strictly started making Fuga for an older audience going all-in on the dark and mature themes (along with that big black T rating being a huge tipping point on the Audience Shift).