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S1 E68: The Evolution Solution

Ash goes to Seafoam Island to help Professor Oak to discover the mystery of how Slowpoke evolves into Slowbro. There, Professor Westwood V is also trying to solve the mystery. Jessie captures Shellder, and tries to rush a Slowpoke's evolution, forcing Psyduck to stall the evolution.

Air date	Oct 15, 1998
Runtime	23 minutes
TMDB rating	★ 7.1/10