Yes, Tartakovsky’s series. It’s widely regarded as a very good series, especially around these parts. I consider it to be much better than the 2008 series, and I think many other users share my opinion.
It’s been a long time since I’ve seen it. I remember not being able to get through it because I hated the animation style. Maybe I should give it another chance. Not sure how available it is though since it’s not canon.