Their accents didn't help either...what in the heck was that anyway?
In the cartoon? Hell if I know. Destro was supposed to be Scottish and he sounded like a black pimp. Granted, I still hear the black voice actor's voice when I'm reading the comics instead of a proper Scot accent, but that's just me.
They were supposed to be "Corsican", which I'm not much familiar with. But from mild reading, it sounds like a mix of French and Italian. The voice actors probably just tried to make a snooty douchebag accent that sounded European, more than likely.
(The "Corsican" twins thing is a literary reference to twins who felt each other's pain.)
I'd like to jump in here, the twins were weird, there is a little accent but its not what it should be. The absolute worst was Storm Shadow, I can do a better Japanese accent. Destro was mentioned but in my old age I no longer hear the black pimp voice. He probably sounds more like Chibs from SOA. Thats who I'd hire to vioce him. The only vioce that has stuck with me all these years is Chris Latta. I hate the guy who has been voicing CC these last few yrs. He sounds like a grumpy old man to me. Just to be clear, I don't like the personality of Sunbow CC (whiney bitch) but that voice is burned into my brain.