Most spikes cannot be destroyed by any means, and instead should be avoided. Touching one will deal a fair amount of damage, knock Kirby away, and cause him to lose whatever Copy Ability he has. Ability Stars and many other items will also break immediately upon touching spikes. If Kirby is under the effects of an Invincible Candy, or is using a move with invulnerability frames such as Burning, he can pass through spikes without taking damage.
Spike fields can also be safely traversed using items such as the Stomper Boot.
Enemies and spikes
In many older Kirby games, enemies tend to be unaffected by spikes, which can lead to odd sights where Waddle Dees can be seen walking care-free through them. Starting with Kirby's Return to Dream Land, however, spikes will also hurt enemies who make contact with them.
Side-effects of spike damage
Much like when getting hit by enemies, taking damage from spikes will give Kirby a brief window of post-hit invulnerability, to allow him to escape before taking further damage. These few seconds of invincibility can be used to bypass other hazards in certain circumstances, as things like Gordos and other dangerous foes are often placed in and around spike pits. This window of invulnerability also tends to reveal that spikes do not have collision in most cases. Due to this, it is not possible to be crushed by moving spikes; instead, characters will be crushed by the platform base which the spikes are attached to.