The Kirby Glitch Left Undocumented for 25 Years

Can you help me solve this Kirby glitch?
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So I'm pretty excited for Kirby and the Forgotten Land on Nintendo Switch, but years ago in Kirby Super Star I encountered some sort of weird glitch that I haven't been able to reproduce since, nor have I seen it documented anywhere online. So I'm calling out to the internet: Do you know about this glitch? Has it actually been documented? I'm hoping some of you Kirby Super Star masters out there can lend me a hand!
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Credits and sources:
Written and filmed by SwankyBox.
Editing by SwankyBox.
Music credits:
Songs from various Kirby OST's
"Introduction" - Kirby's Dream Course
"Time to Learn" - Kirby Super Star