Polymega is a retro emulation device that supports a number of older game systems, from the NES to the original PlayStation. The base unit comes with a disc drive that allows you to run games from disc-based consoles, such as the Sega Saturn, while "element modules" can be purchased separately and attached to the console to run cartridges. Currently there are modules to support the NES, SNES, Sega Genesis, and TurboGrafx-16. However, the company behind Polymega, Playmaji, recently announced an N64 module will be added to the lineup soon.
In an interview with Nintendo Life, Playmaji CEO & Co-Founder Bryan Bernal said that the N64 has been their most requested module, since there are very few options to legally play N64 games. While he can't guarantee perfect compatibility with all N64 games, he can promise "it will be at a minimum above 90% working great to near perfect." All Polymega modules also come with a controller based on the controller for the console it's based on, and this one is being developed by Retro-Bit, the company behind the Tribute64. Although, it won't be a perfect recreation. It adopts the look of a more traditional game controller and, as Bernal points out in his Nintendo Life interview, it has a 'SELECT' button, which N64 controllers never did, but this design will help give the controller more compatibility with other games and systems.
The new module is expected to release sometime in 2022, and will cost $80.