So I saw this anime as a kid, a group of kids go into a really weird train that can talk. It takes them to a different dimension. Turns out they some weird thing that can make them transform. But it the end it’s just a dream of the main character. The protagonist and the other kids gets stuck in the elevator and they go unconscious. That’s the finale.
I know it’s not a lot but I can’t get it out of my head. I remember that it used to play in Jetx or CN or DisneyXD.