Actually these guys are called Space Goofs or Stupid Invaders or Les Zinzins de l'espace depending on what country you see them in. A cartoon that flew completely outside my radar, I had never heard of them before finding these Carl's Jr. fast food premiums at a garage sale last weekend. Released in 1998, they're marked "Gaumont" and "Saban," which was the only way I was able to track down who they are.
Apparently there are two more Space Goofs, and two more toys in this series: Candy Caramella and Bud Budiovitch. I'd love to add them to my collection; I have a spare Gorgeous Klatoo and a spare Stereo Monovici, so if anyone out there wants to make a trade email me!
In the meantime these guys make the ultimate fall decoration - I take them out for Halloween and don't have to put them away until after Christmas!