[Error] Undefined local variable or method “bikini” for #<PokemonGlobalMetadata>

[redx258]

I'm using PEv20.1 and added this PEv19 script into my game: (broken link removed)
It's a script that displays a "bike stop" graphic from BW. It works flawlessly in my current saved file, but when I try to start a new game this message pops up:

The plug-ins are shown to be running successfully and I imported the graphics into the right location. I wrote them in the metadata, so I'm puzzled. I have limited experience with coding, so even though it's conveying the problem to me, I honestly can't understand it. This is my first post, so help would be greatly appreciated. Thank you.