--- Sky Base Zone --- Number of acts: 3 Time to complete: ~5 minutes Difficulty: Hard Bottomless pits: Yes Water: No Level wrapping: No Enemies: English name Japanese name Description       Unknown "Bomb" Unknown Similar to the Bobomb enemies from Mario games, they explode when Sonic goes near them, throwing out four pieces of shrapnel. Only one of these enemies appears in act 2.       Orbinaut (Source: Manual) Uni Uni (Source: Sonic Jam) Uni Uni (Source: Manual) Spherical enemy, surrounded by four spiked balls. Moves along very slowly and can only be destroyed when Sonic is invincible.