@MLE_online @ranjit Off the top of my head I'm not sure.
Klasky Csupo was pretty tight with Nickelodeon for pretty much the entirety of the 90s. I know after they brought in Igor Kovalyov he convinced a lot of other former Soviet artists to come over and they brought their own works with them, some of which got air time in the US.

I'm about to do my cartoon stream thing, but I will do some digging later!