unleagel? its illegal mate... If u wanna play import games try using a freeloader but one for the wii hasnt ome out. Also the freeloader for the gc apparently doesnt work because of the wii update. This means if one comes out for the wii it may not work for long.
so the short answer is no.
If you do chip ur wii u can no longer download updates as they could screw up ur system.