Gameplay Mechanic: The Golden Knight is a "pet" with the highest carrying capacities in the game. Able to hold objects such as the notorious "water tub (VERY HEAVY!!)" furniture.

You know what?

It has been a while since I have met another Elona player.

Is this game decently popular in Japan?

It's sort of a doujin niche fandom thing.

The original creator seems to have stopped, but it's basically being worked on open-source with players cooperatively adding on a whole new map and high-level content.