The Mayor already sounds like Dr. Robotnik, but the first school episode had him teaching chemistry under the effects of a hat that turns its wearers into a Sadist Teacher, effectively making him a Mad Scientist.
Bonus Episode: A special eight-minute short was released on the Wii no Ma Channel in Japan. It was dubbed and available on Nintendo Video for Nintendo 3DS, three years after its original release.
Cash Cow Franchise: Nintendo of America attempted to turn the Kirby series as a whole into one when bringing the anime overseas - but while the games and show remain popular, the only merchandise it managed to produce in Western markets was a handful of [VHS] tapes and DVDs.
Admittedly, Nintendo wanted to make Kirby "the next Pikachu". More or less, this did not happen.
Executive Meddling: The "Air Ride in Style" two-parter. In the original, these episodes (called "Crisis of the Warpstar") came close to the end of the series, and were supposed to be Kirby's training for the final battle. In the dub, they were stuck in the middle of the series in order to advertise the then-new game Kirby Air Ride.
In the days when the anime first aired in the US Meta Knight was called the "Mexican Vampire." Much silly fanart followed.
Knuckle Joe's unnamed father also has a few. The most popular is "Jecra".
Customer Service, as he isn't named in the dub, is often called "Frontman" or "Salesguy".
Keep Circulating the Tapes: This series only really received a handful of VHS/DVD released from 2002-2008, all in all not counting multiple releases and counting the Fright to the Finish movie which is the final 5 episodes merged into a single film with a bonus episode as a special feature, and counting the 3 episodes included on the 20th anniversary Wii game, which also includes the first episode, which as mentioned before has been released at least twice, only 25 episodes out of 100 have ever gotten a DVD release in America, literally only 25% of the series has ever been released. This series is semi-reliant on continuity and a lot of key episodes haven't even been released! Especially in the movies case where we see several characters from episodes not even on DVD!
Newbie Boom: While it didn't make a Cash Cow Franchise out of the series the same way the Pokemon anime did, quite a few Kirby fans will admit that the show is what introduced them to the series and it shows. The anime still maintains a dedicated following to this day. So much so that, since its conclusion, HAL has brought various things from the show into the games and even included several of its episodes in Kirby Dream Collection which celebrated the series' 20th anniversary.
In the original, there's actually quite a few. For instance, Takashi Nagasako as Mayor Len and Professor Curio; Nobuo Tobita as Chief Kawasaki, Kabu, Galaxia and others (including Macho-San); and Yuko Mizutani as Mabel, Waddle Doo and several Demon Beasts. Kirby and Hohhe also have the same actress in the original.