Donkey Kong 64 features a unnamed bat enemy found within certain stages such as Fungi Forest, Creepy Castle and Crystal Caves. This enemy would reappear in future games such as DK: King of Swing but under a seemingly new name: Flipflap.

It turns out that this particular name was already used for this enemy back in the Japanese localization of Donkey Kong 64. In the bestiary within the official Japanese DK64 guidebook, they are named フリップフラップ (Furippufurappu), which of course translates to Flipflap in English.

The development of DK: King of Swing began in the summer of 2003, with the development team at Paon exploring ideas for new control concepts. While experimenting with the Game Boy Advance's L and R buttons, they came up with the idea that pressing the L button will let the character grab with the left hand, and pressing the R button will do the same but with the right hand. The team was also influenced by free climbing becoming a popular sport around that time.

It was Toshiharu Izuno of Nintendo that proposed the team to utilize the Donkey Kong character license for the game. At first, it was originally planned to use original characters, but the decision to use the Donkey Kong IP was done to give the project more global appeal.

Bubbles, from the game Clu Clu Land, is a secret character in this game's multiplayer mode. The game's peg swinging design is also based on Clu Clu Land.

Nintendo initially planned to give the Game Boy Advance a large-scale release in mainland China through their subsidiary in the region, iQue. However, they ultimately pulled out following rampant piracy of the system's first few Chinese releases. Consequently, Chinese localizations of several other games were cancelled despite being mostly complete and sent to the Chinese government for review. On March 25, 2019, game preservationist collective Forest of Illusion would leak twelve of these Chinese-language builds online, covering the following games:

• Advance Wars
• DK: King of Swing
• Densetsu no Starfy
• Densetsu no Starfy 2
• Famicom Mini Collection
• Fire Emblem: The Binding Blade
• Kuru Kuru Kururin
• Kururin Paradise
• Mario & Luigi: Superstar Saga
• Mario Kart: Super Circuit
• Polarium Advance
• Tomato Adventure