Thanks to a helpful fellow fan of Robopon, I was able to get my hands on a pair of Robopon Doujinshi that I'll share with you all.

So thanks friend, you know who you are! And you rock!

Sadly they are semi-incomplete, missing the artwork of Belemnite, but they're otherwise complete. Hopefully I'll be able to one day get my dirty mitts on the full stuff. But until then, enjoy what is here.

Neato when the guy doing the original manga contributes to fan-comics.

Base +6, lucaslsd +6, IuriPoiPoi +6, Dark Wraith +6, Megazord0h +6, SapphireJack +7

Incomplete how? The dojin looks complete, numbering wise, has cover, second page is presumably back cover, last page looks last last page end credits...

Base +53, Dark Wraith +6

Credits (going by the final page)

03-13, 20, 45, cover: 井上あきひろ (Inoue Akihiro)
14-15: 大瀬津波 (Oose Tsunami)
16-19: リリフ (Ririfu)
21-30: 悪の東丈 (Aku no Toujou/Tojyo)
31-44, back cover: タモリはタル (Tamori Hataru)

Pages 03 to 13 (Inoue Akihiro) do seem to be missing, as per the OP's comment, but the cover and spot illustrations he did are still present.

Base +4

I'm glad Tamori Hataru didn't let his interpretations of Robopon's female characters go to waste, because they're honestly really cute, and very sexy despite how exaggerated they look.

Base +5