This episode serves as the climax for the Big Five sub-plot. It’s pure fanservice for anyone who loves high-level fusions and the "Power of Friendship" overcoming literal corporate greed.
The Big Five are back and more desperate than ever. After stealing Tristan’s body, they’ve forced a 5-on-2 duel against Yugi and Joey. This episode is all about survival and the debut of some seriously weird fusion mechanics. Yu-Gi-Oh! Duel Monsters Episode 113
Seeing all five former KaibaCorp executives cycle through their Deck Masters in one body is peak "boss battle" energy. Each brings a different unfair advantage to the table. This episode serves as the climax for the Big Five sub-plot