looking for criminally underrated Anime Fighters or mecha RPG's

[stealthRUSH stealthRUSH]

Fill-in Cafe's Mad Stalker: Full Metal Force (1997) on PlayStation

More of a brawler, beat'em up style mecha game. A remake from the original X68000 which was also ported to FM Towns, PC Engine Arcade CD-ROM² and more recently dumped Mega Drive.

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Hudson Soft's Blood Gear (1994) on PC Engine Super CD-ROM²

Which is a criminally underrated mecha RPG that fits your description- although its on PC Engine CD. I've started playing this not too long ago. Since it was never localized, and currently no fan translation exists I'm using guides online.

 

[Evoluder]

Gonna throw in my recc for SRW OGs as well. It's the cream of the crop, and has so much content I still don't feel like I'm half done after 100+ hours. The animations and story make the modern games look like slop. Seriously, give it a go.

Hopefully Gaiden and 2nd OGs get a translation soon, and maybe a retranslation for Moon Dwellers.

Oof that would be the dream but I doubt it

Alpha 1's TL has been in WIP for more than a decade and it's still not done, and 2nd OG is even bigger
Gaiden does seem doable enough for the team that worked on the OGs TL