Is there a Yu-gi-oh duel monsters episode 225?

There is no Yu-Gi-Oh! Duel Monsters episode 225. The series ended at episode 224.

It's possible you might be thinking of a different Yu-Gi-Oh! series like:

* Yu-Gi-Oh! GX: This series had 182 episodes.

* Yu-Gi-Oh! 5D's: This series had 154 episodes.

* Yu-Gi-Oh! Zexal: This series had 146 episodes.

* Yu-Gi-Oh! Arc-V: This series had 148 episodes.

* Yu-Gi-Oh! VRAINS: This series had 120 episodes.

* Yu-Gi-Oh! Sevens: This series is still ongoing.

Let me know if you're thinking of a different series!