Utchan Nanchan no Hono no Challenger - Denryuu Ira Ira Bou (ウッチャンナンチャンのほのちゃらんしゃーデンリューイライラ棒) is a Nintendo 64 game developed by Hudson Soft and released in Japan in 1998. The game is a puzzle game that features a unique combination of action and puzzle elements. Players take control of Utchan, a small creature that is able to move blocks around the game board. The goal is to clear the board of all blocks in order to progress to the next level. The game features a variety of different levels and challenges, ranging from easy to difficult. Each level has its own unique set of blocks and obstacles that must be overcome in order to progress. The game also features a two-player mode, allowing two players to compete against each other. The game also has a time attack mode, where players must clear the board as quickly as possible. The graphics and sound design of the game are simple yet effective. The game board is colorful and vibrant, while the sound effects and music are catchy and upbeat. The game also features a variety of power-ups, which can help players clear the board quicker. Overall, Utchan Nanchan no Hono no Challenger - Denryuu Ira Ira Bou is an enjoyable puzzle game that offers a unique mix of action and puzzle elements. The game's simple yet effective graphics and sound design make it an enjoyable experience for both young and old alike.