Hariisen

Harrisen is a robot created by Doctor Eggman. It serves as an enemy in Sonic Advance 3, appearing in the underwater sections of Twinkle Snow. It resembles a pufferfish.

Attack Pattern
When the player approaches Hariisen, it will begin to puff itself up, revealing spikes in its body that points in six directions and then firing them. Once Hariisen is spike-free, the player has the opportunity to attack them unharmed before it puffs itself up again.