Ep. 20: Ash fällt in Sandiles Loch und beobachtet dessen Evolution während des Kampfes

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After a short practice match between Scraggy and Axew, Cilan calls everyone for lunch, but Ash falls down a giant hole dug by the Sandile from the hot springs. Ash finds out that it wants to battle Pikachu, during which it evolves into a Krokorok, but Pikachu's Electro Ball sends it flying off. (Source: Wikipedia)