These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Also Molly since its unclear if she's truly sociopathic or innocent.
Darker and Edgier: This movie tends to be a fan favorite because it deals with more serious psychological issues like abandonment, childhood trauma, and out-of-control wish fulfillment. Not to mention Ash actually has a real reason to participate: Entei kidnaps his mother.
Fridge Brilliance: Each of Molly's battles with Ash, Misty and Brock took place on a different plane. She battled Brock on the ground. Then she battled Misty underwater. And finally, Ash took his battle with Entei to the skies once Charizard arrived.
Surprisingly Improved Sequel: It's considered to be amongst the best (if not the best) of the Pokemon movies, up there with Lucario and Keldeo
Squick: Brock flirting with teenage Molly could be this, considering Molly is actually a five-year-old girl.
Tear Jerker: When Delia Ketchum is kidnapped, Ash becomes very upset. "She's gone! ...I couldn't save her!"
Molly's story. Her mom is already gone at the start of the story (It was confirmed in the Japanese version that she left her father because he was a workaholic obsessed with finding the Unown), and then her father disappears from her life too, so she creates a whole new fantasy world so she can have the things she wants most. The thing she wants most of all? Her mother.