Dota-kun no Bouken Roman is a cancelled side scrolling platform / action game that was in development for the Famicom / NES that was produced by Atlus and was going to be published by Imagineer. There are basically no info about Dota Kun’s gameplay, but we can look at some scans that were uploaded on a japanese website. On GDRI we can read some more info on the development:
Dota-kun no Bouken Roman (“Dota’s Romantic Adventure”) is some sort of side-scrolling action game that was to be published under Imagineer’s WaveJack Jr. label. It was based on an MSX game by SystemSoft. You can see ads and screenshots here. The point is, I asked Esaki if it was developed by Atlus (because I suspected it was). He said it was produced by Atlus, but it was programmed outside the company. That seems to have been a common practice for Atlus, especially in the early days.
Thanks to Celine for the contribution!