The same thing happened for the promotional material for Kirby: Right Back at Ya!. Kirby Super Star Ultra and Kirby's Epic Yarn are exempt from this phenomenon, although the trend continues into Kirby Mass Attack and Kirby's Return to Dream Land. For some undisclosed reason, although likely attributed to cultural differences and atmosphere at that time, Nintendo of America decided to depict Kirby's eyes as significantly sharper-looking than his usually benign expression on the US box art of several games, starting from Kirby: Nightmare in Dream Land, and including (in chronological order) Kirby Air Ride, Kirby & The Amazing Mirror, Kirby: Canvas Curse, up to Kirby: Squeak Squad. With regards to Kirby's appearance on the box art of games and certain artwork, there is a phenomenon fans refer to along the lines of the "angry Kirby" look. The new design has been used in all subsequent games. His appearance has changed subtly over the years, his arms and body becoming more rounded and his facial features more defined with larger eyes. The latter is confirmed in the anime episode 'A Dental Dilemma', where Hardy couldn't find Kirby's teeth to clean. Kirby has no form of skeletal structure nor does he have teeth.
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series suggest that he is light enough to be easily carried. His weight is not known, although several parts of the anime and the Super Smash Bros. games depict his height as about three feet when compared to the other characters. Officially he is 20 centimeters (8 inches) tall, but the Super Smash Bros.
Kirby's body is soft and flexible, allowing him to flatten himself or expand like a balloon.
In subsequent games until Kirby 64: The Crystal Shards, they were depicted as three red diagonal lines in artwork, although they were usually always solid red ovals in-game (except Kirby's Dream Land 2, where they were missing from his sprite). Kirby's cheek-blushes weren't introduced until his second game, Kirby's Adventure, where they appeared as two black whisker lines in artwork. Kirby is a small pink spherical creature with two stubby arms, two red feet, and two oval-shaped eyes with black pupils (with a faint shade of blue at the bottom starting with Kirby Super Star, which was brightened in later appearances).