I was talking to a friend at work the other day about bizzare game genie/gameshark codes that we have come up with in the past.

a few of mine:

super mario bros.
sueisa: enemies become powerups
stageo: all enemies throw hammers


contra
apzlgk: randomizes levels and makes crazy stuff show up


What are some of your favorate bizzare (non-codebook) codes you've come up with?