[TokuKnight89]

Dyna Robo is vibrant and relatively solid on its own (and arguably takes the "cake" when referring to the first Sentai Mecha adaptation, given the dub parody), but the individual vehicles are a tad childish/cheesy and don't jive in today's world (saying that when Zyuohger made blocks marketable). The weapons and attacks are all very typical, and I wasn't necessarily moved with Dyna Robo's final battle in the series.

Bio Robo also suffers, but not in the same manner. The individual Jets are minor and aren't that significant. The top-half makes a decent Jet, but the second-half looks like flying legs with a nosecone! Bio Robo was clearly ultra-obvious marketing done surprisingly well! An old designation for the Mecha of Gear was "fodder", and that isn't inaccurate! The giant battles were largely, but not always mind you, obligatory and a well-crafted bid to sell Bio Robo! Some Gear Mecha were apparently central to an episode's plot, and I don't need to say anything here about Balzion (shame that was never made into a figure). Bio Robo was also one of the first Sentai Mecha to show a degree sentience, or so I've read. Plus, I'd be willing to assume that Bio Robo is first place or a close second when it comes to various Sword attacks! Before developing newer, more standard moves later in the series, Bio Robo used a plethora of sword-based finishers!

In conclusion: Mildly decent Vehicles merge into far superior Robots!