One of Nintendo's classic glitches is back! I'm so happy that you can find Missing. No in the virtual console releases of Red and Blue! For those not aware, Missing No. was a glitched Pokemon in the game who was capable of giving you a ridiculous supply of the 6th item in your inventory. This allowed for you to get a ton of Rare Candy's and level up your Pokemon relatively easy.
I'm kind of surprised they are allowing this to slide seeing as these Pokemon will be able to be transferred between versions! It'll definitely be an issue when it comes to competitive play.
See the process to find Missing No below. I wonder if the Safari Zone cheat works?