Board Thread:Theories and Speculation/@comment-26538017-20150629134356/@comment-25442883-20150629183115

Almost every anime have their kind of power which is combined from physical and spiritual energy, in Naruto it's Chakra, in DBZ it's Ki. Every human have spiritual and physical energy, we just can't combine it to use as weapon. So yes, Goku should be able to be traped in Genjutsu, just i'm not sure about people who couldn't combine 2 energies into one.