whats disc rot?

disc rot is when a disc starts self destruction from bad conditions

Oof. You got owned...

Fraud is a form of theft. Tsk tsk tsk.

a guy called boni posted saying the nsmbu disc he bought on ebay had disc rot

i also have an nsmbu + nslu disc with disc rot

my wii u does recognize the disc but if i start it it pops up an error, after that, its now called invalid disc