I don't know why I didn't think to stick my Spike Top upside down from the bottom side of a shelf but I am absolutely stealing that idea now! Haha.
Awesome collection! I just recently started putting my Smash Bros collection back into some cabinets after a long time in storage and your post made me want to finish it up ASAP so I can share my collection as well.
I'm waiting on my figma Doom guy and Nendoroid Sans to arrive too. I've never played Undertale but the Mii Gunner costume is the perfect excuse to add another character to the collection . Are there any other Nendoroids that can pass as Miis in costume?
Still working on my lighting and I have a placeholder Sora figure coming in on Saturday (the Medicom until I can manage to find the Figuarts for a reasonable price) but I wanted to go ahead and post something now!
Full view (with Pokemon setup on top of the detolfs)