Chet Rippo

Chet Rippo will upgrade one of your stats randomly, but downgrade another in Paper Mario. It's best to simply avoid him. He appears in Toad Town near the Shy Guy's toy box house.

In Paper Mario: The Thousand-Year Door he does the same thing, except you can choose which stat to upgrade and downgrade. You should see him once in a while, if you want to even out your stats for a fair price. Chet Rippo can also switch two partners' ranks around. The price for either of these is thirty-nine coins. He appears in the house in the background of Rogueport Sewers near the main entrance. Use Bobbery to crack the wall directly left to the entrance.

Notice the name? Chet Rippo... Cheat rip off.