BW108/BWS2-24: Unova League Conclusion! Lucario vs Pikachu!
Airs: 10th of January
Summary thanks to Chao.
New summary:"The Isshu League fiercely continues into the fourth round. Ash and Kotetsu's battle continues to become even more extreme. Kotetsu's partner Riolu then evolves into the Wave Pokemon Lucario. With all of its moves powered up plus learning a new move, Satoshi and Tsutarja are both cornered..."