Luigi as Wes Weasley? (not making this up at all)
While trying to find out who did the characters, I was fooling about listening to animation demos (which use scenes from cartoons) and found something shocking.
Apparently, Wes Weasley (the salesman) has 5 voices!
James Rankin (aka Cheatsy (Larry) Koopa from Mario cartoons)
http://vbfile1.voicebank.net/sandboxes/985/Animation%20Demos/Rankin%20James-animation%20demo.mp3
Tony Rosato (Luigi!)
http://vbfile1.voicebank.net/sandboxes/985/Animation%20Demos/Rosato%20Tony-animation%20demo.mp3
Rod Wilson
http://vbfile1.voicebank.net/sandboxes/985/Animation%20Demos/Wilson%20Rod-animation%20demo.mp3
Dwayne Hill
http://vbfile1.voicebank.net/sandboxes/985/Animation%20Demos/Hill%20Dwayne-animation%20demo.mp3
and of course his final voice that we hear on TV.
In case you want to know F-T-A was the prototype name for the salesman company that was slipped into The Magic Hassle episode in the flashback (it is hard to see) which stands for Fool Proof-Trapping-Appliances instead of HDSVADL (Handy Dandy Super Villian Appilances Distribution Ltd) in Birth of a Salesman.
Can we say prototype voices?