LetterBomb working?

GUYS! I SWEAR I SAW A LETTER BOMB LETTER IN MY MAIL ON MY WII LOADER ON MY WII U!! I swear guys, I swear. I did what you would normally do with LetterBomb for your Wii, I found my MAC Address from the Settings app in my Wii U menu. When I finally decided to put in my SD Card, I went into the Mail and went directly to yesterday. There was nothing. When I went back to today, I first saw a red letter and then a white letter pop over it. After that, i could still see the SD card logo on top, but I couldn't see the letter itself, I could only see the white letter. I did not want to damage my beloved Wii U so I just took out the SD card, and turned off my Wii. Please test this for me!

If I just discovered a new method of hacking the Wii mode on Wii U, can you please give credit if you make tutorials?