Retro Video Game Shopping

We are gonna spend a good chunk of the day tomorrow hunting for games. There is upwards of 10 Retro Video Game shops in our city. We also hit a few other super secret game Spots :)
I'm gonna get two SNES games. Sim City & ? And Tyler is gonna get Arobiz.
Sim City is $20 and Arobiz is $20 or $30. I am also gonna get a couple of $20 NES games. Maybe Contra or Punch Out or Ghost 'N Goblins ?

SNES Game Genie

I had a Game Genie for my NES but had no idea there was one for SNES ?The SNES and Game Boy models also had a button or switch to turn the codes off and on while playing in case of situations where the codes may impair the game.