Hey hey @Anonymous! Going off of what you're saying, it sounds like you're talking about the Halloween event they had in Real VR Fishing. In that case, from what I can find, it does in fact look like it was only available during the event.
If you want an official answer (or have any other questions about the game) I'd recommend checking out the developer's FAQ. There's also an option on that page to submit your own request for anything not in the FAQ, such as about the Halloween event content. Hope this helps!
