A anime about some kids in a museum

I remember watching a anime or at least I think it was a anime about a group of kids are on a school trip to a museum and they find I think a secret part of the museum and I think they get transported to some room or something and I think they suddenly get some weird animals and they can fuse with the animals to become powerful or something and I think they have to travel to another world or the past to save the world from some evil I found it on YouTube awhile back and watched it but can’t remember what it was called so can anyone help me with this please

View Reddit by glitchwolf69View Source