I thought X2 ended after 12 episodes. I knew the manga was going, but still. Didn't think there was enough story to make it go for so long. I'm actually disappointed Kenichi didn't go for much longer. Up until the last arc, it was really good.Looking at Crunchyroll right now. X2 currently has 24 episodes spread across two seasons. Wikipedia says a third season will follow and end X2 at 36 episodes.
Yeah, I really liked Kenichi. I was surprised when I stumbled onto the OVA series but it only lasted for 11 episodes.