Yu-Gi-Oh! GX Episode 120: Battle in a Strange World! The Gem Beasts VS the Harpy Ladies
Episode 120 of 180 of Yu-Gi-Oh! GX, aired January 24, 2007, 25 minutes. Available with English subtitles and dub where released.
Episode summary
After arriving in the strange world, our heroes come to realize that this isn't a game anymore and that spirits are real. They then learn their Bio Bands are still draining energy.