Shadow the Hedgehog is a boss that appears in both Sonic Boom: Rise of Lyric and Sonic Boom: Shattered Crystal. In Sonic Boom: Rise of Lyric, it takes place in Abandoned Research Facility, and in Sonic Boom: Shattered Crystal, it takes place in Shadow Canyons.
Sonic Boom: Rise of Lyric
Shadow serves as the first boss of the game and is encountered at the end of the Abandoned Research Facility where the player must fight him as Sonic and Tails. The battle is separated into three phases, each in a different point in time; the present, the ice age and the prehistoric.
The battle begins in the present where Shadow will launches several balls of energy that will home in on the player (unless they have gotten Shadow to fire at the very boundaries of the stage). After Shadow finishes his attacks, the player must attack him. After some time, Shadow will envelop himself in a red aura and start attacking the player at high speed. While he is in this state, the player cannot touch Shadow without taking damage, so dodge him instead. Once this is over, Shadow will launch some bolts of energy, though afterwards he will be open to the player's attacks.
When Shadow has taken enough damage, the battle will shift to the ice age where the field is enveloped in ice. Shadow's attack patterns in this phase is the same as the first, except Shadow will launch Chaos Spears that will fall to the ground and explode after shortly after. To dodge them, the player must avoid being at close range when they fall and explode.
When Shadow has taken enough damage again, the battle will shift to the prehistoric area in a desolate desert. In this phase, Shadow will use more new attacks, like teleporting around the field and attack the player at high speed, and trigger a Chaos Blast attack that covers a wide area. The teleportation can be avoided by always changing direction as Shadow teleports and the Chaos Blast can be dodged by standing at the opposite side of Shadow, near the edge of the arena (as he also does it in the center). After several attacks at Shadow, the battle will end and the player wins.
Sonic Boom: Shattered Crystal
The battle against Shadow is simple: the player must reach the goal before Shadow to end the battle.