Actually, $*KERNEL is implemented. We even have it mentioned in the documentation: * https://docs.perl6.org/language/variables#index-entry-%24%2AKERNEL * https://docs.perl6.org/type/Kernel
The tests are in https://github.com/perl6/roast/blob/master/S02-magicals/KERNEL.t and can be unfudged (but ? has to be replaced with *). That's about it. I'll link other kernel-related tickets with this one.
