Malamar is an Aroma/WUPS plugin based on Pretendo's Malamar that patches various Nintendo Network URLs on a Wii U to use Splatfestival/Spacebar Network instead. It also (for the time being) bypasses SSL verification in most cases. It redirects Nintendo Network in:
Malamar is only supported on the release version of Aroma configured for autoboot/coldboot. Other configurations (specifically lacking coldboot) may cause issues with SpotPass.
Malamar's patches are all temporary, and only applied in-memory without modifying your console. The SSL patch, while also temporary, could reduce the overall security of your console while active - this is because it no longer checks if a server is verified. However, this does not apply to the Internet Browser, where SSL still works as expected.