Dexter's Laboratory Keychains were merchandise manufactured by Trendmasters in the 2000s. The keychains were attached to a key fob shaped like Dexter or Dee Dee; the fobs could talk via button activation.
Dexter: "Dee Dee, get out of my laboratory!"
Dee Dee: "Hi. I'm Dee Dee! La-la-la-la-la! Ha-ha-ha-ha-ha!" and "Now you gotta kiss me-MUAH!"