In my FCEUX emulator, I used the code 01DE:0E (translated to GG code "TEIETO") to allow me to select a team outside the list. I then deactivated the code before I selected it. It then randomized the CPU team selection like it usually does and it brings the invisible team to its first week of the season! I played through the first week like the usual, and then came the screenshot I took afterwards. For what appears to be the first time ever in about 28 years, the Invisible Team finally makes the front page of Tecmo Sports News! An unofficially tested in-game password provided by the front page cover is found.
As with any invisible team you play in this game, you may crash the game if you select a blank play. You can only try for a field goal or punt kick. Other than that, INVISIBLE TEAM WINS!