I³ is a type of invincible enemy and hazard which debuted in Kirby 64: The Crystal Shards. It is a green trapezoidal box with rounded edges and a single, large eye on its front side. I³ is invincible and repeatedly moves up and down, attempting to land on Kirby and do him harm. While it will hurt Kirby if it hits him or he touches it, it cannot crush him, instead just dealing him one bar of damage and knocking him away like any other enemy. I³ appears on the 32nd Enemy Info Card.
I³ can be found in the following levels and stages:
|I³ locations in Kirby 64: The Crystal Shards|
|Stage||Pop Star||Rock Star||Aqua Star||Neo Star||Shiver Star||Ripple Star||Dark Star|
- In behavior, I³s resemble the Thwomp enemies from the Mario series.
- Their behavior is also similar to an enemy called a Thudd, which also resembles a Thwomp.
- I³ somewhat resembles Dark Matter because of its single eye, but the two have no real connection.
- Additionally, perhaps by coincidence, I³ and 0² are the only enemies in the Kirby series who have exponent numbers in their names, and both of them occupy the same game.