Long, long ago there was a Tikipedia theme for Tiki, around version 7. Finally (due to the relative ease of doing themes with Bootstrap and the developer time supported by Synergiq Solutions), Tikipedia is back again, for Tiki 15.
Installation is pretty straightforward. The trickiest part is probably to be sure to give the topbar menu a "tikipedia_menu" class in the admin-modules' "Containing class" input, to position the menu correctly. More details are in the theme info.
Give it a try if you like, and let me know about any problems with the theme or documentation. Thanks.