Originally Posted by
Fri
It's actually common practice in anime. Not all episodes are worked by the same animation studio. To save budget, usually they have important key episodes like climatic battle, end and start of seasons, etc, worked by expensive, high quality animation studios, and the rest are off sourced to cheap animation companies overseas, like in South Korea or Indonesia. I'm have art degree, and I remember some of my friends interned in one of those animation farms in college. Obviously, not all anime does that. I think it's mostly longer ones.