Entei at your Own Risk is an episode in the Master Quest series. It first aired in Japan on 8-1-2002 and in the US on 8-16-2003.
A boy wants to capture an Entei, so he sets up tarps around hot springs to lure Entei. In order to capture Entei, he has to have his Misdreavus use Mean Look so that Entei can't escape. He demonstrates this to Ash against his Phanpy. Team Rocket tries to capture the Pokémon in the hot springs, but Brock's Pineco, who evolves into Forretress, and Entei helps to send them blasting off. The boy then challenges Entei, using Mean Look right away. His Misdreavus does a whole bunch of attacks, but to no avail. Entei then uses Roar to counter the Mean Look, and runs off. The boy promises to capture Entei and says his farewells to Ash and company.