OmniZero.4 showed up at Robo-One 11 and made a startling entance (below), considering that OmniZero.4 broke one of its frame members, that Maeda-san had to fix just before geting on the built train, and he worked on it a little at the event too.
The 1st day ended with OmniZero receving first place with a really high score of 453 points. And second place going to Majingaa, with 21 points behind OmniZero at 432, which is still a very good score.
Maeda-san working on OmniZero. It looks like OmniZero.4 is controlled by a PS2 controller.
If you look closely you can see some interesting looking things that look like IR sensors, or something of that sort, on the back of OmniZero.