Anyone know what anime (possibly?) I’m looking for?

So there’s a kids movie that I remember seeing advertised in a magazine, and I’m pretty sure I saw at least part of it at some point. I saw it sometime between 1999 and 2002, but it definitely could’ve been older.

Here’s the list of details I remember,

1. Was probably made for tv/direct to video, considering it’s probably pretty obscure.

2. It was animated, kind of looked like an 80s anime or something inspired by that.

3. The main character was a little girl, who I think was an orphan that lived with her grandma or something.

4. Said grandma is gone for a while, and the girl somehow goes to a fantasy/pretend world.

5. She’s accompanied by either a dog or Bear or some sort. Possibly a living toy a la Winnie the Pooh

6. There’s a train they ride on.

7. There’s a storm scene which is pretty intense and basically the climax.

8. I’m pretty sure it was advertised in one of my mom’s parenting magazines that I found and flipped through.

Anyone have any idea what this could be?

Thanks!

Edit: It’s not a Studio Ghibli movie! It might be an anime of some sort, or it might be a western animated movie influenced by anime in the visuals.

Second edit: I know if I saw the print ad and/or the actual movie, I’d instantly recognize it!

Please ask in You Know That Show.