From the Super Mario Wiki
“It is a pleasure to rob you! I mean... meet you!”
The InterChet is a large cube who runs the Flipside Arcade in Super Paper Mario. He offers a variety of games that Mario and his party can play to win various prizes. He also runs the rewards center, the same way Lahla did in Paper Mario: The Thousand-Year Door. Although his Catch Card reveals that he is the inventor of the similar character The InterNed, both Tippi and Tiptron state that almost nothing is known about the InterChet; he's "literally a black box". Judging from some quotes, It can be said that the InterChet is a con artist. His name is a portmanteau of "internet" and the name "Chet".
 Catch Card
Card Type: Uncommon
 Names in Other Languages