Back when I first started lioden I was spamming explore looking to claim lionesses, during the march event. I got a glimpse of the scene turning from day into night and this starry lion as well as a regular lion, but I had hit explore again before I registered what had happened.

I think I might've skipped the mukombero encounter. Does that count as my one time getting it for my main account, or is there a chance I could find it again?