Entei was a main character in Pokémon 3: The Movie. He is an illusionary Entei that appeared to Molly Hale after she made a wish to the Unown, serving as a replacement father for her while her real father was trapped in the Unown dimension. He did everything Molly asked for, even kidnapping Delia Ketchum so she can be Molly's mother and providing her with Crystal Pokémon for her to battle Brock and Misty with when they entered the tower that Entei had created to rescue Delia. When Ash attempted to confront Entei to get his mother back, his Totodile and Cyndaquil were rapidly defeated, with Pikachu only lasting longer without fairing any better, and even Charizard was only able to hold Entei off without actually defeating it. However, when Entei was about to kill Charizard, Molly finally decided that she wanted things to be real again. Accepting Molly's decision, Entei helped Pikachu and Charizard defeat the now out-of-control Unown, subsequently bidding Molly farewell and assuring her that he would always be in her dreams. Got from wiki. 
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