A Jyk (ジャキール, Jakir) is an enemy/trap in Super Smash Bros. Brawl's The Subspace Emissary mode. It is a non-sentient spike ball that either stays in one place or moves in a predetermined path. There are three varieties of Jyk, depending on the environment: Flame Jyks appear in caverns and ruins, Zap Jyks appear in the sky and in mechanized areas, and Hydro Jyks appear near lakes, rivers, and frozen tundra. Besides the effect of the damage they deal and the particle effect that surrounds them, there is no difference between the types.
Jyks are immune to all attacks and therefore cannot be destroyed, making them more like an obstacle than an enemy. It also cannot be captured by a trophy stand; one must clear Boss Battles with 20 characters to get the Jyk trophy.
A six-spiked enemy. Attacking a Jyk will do no damage, as they can't be defeated. But you'd better believe that a Jyk will deal out damage to you if you get too close. This foe epitomizes player-hindering obstacles--it gets in your way... and it hurts. It definitely isn't thought fondly of by the characters in the game. It may have something to do with its SHARP SPIKES! Ouch.