Rectangular glass cuboids with machinery within.
Power cubes are objects that appear in  Amy Rose's version of Hot Shelter in and Sonic Adventure . They can be used by Amy to open sealed doors or paths by placing them in their matching fixtures, similar to Sonic Adventure DX: Director's Cut Key Stones.
The power cubes look like rectangular cuboids made of glass, with two opposing square-shaped sides made of metal, and have each a piece of machinery inside them that can be seen through the glass. They all come in four different colors: purple, yellow, blue and orange.
Power cubes appear exclusively at two points in Amy's version of
Hot Shelter: first in a room filled with monitors where the power cubes lie in plain view and later at the end of the Action Stage, where some power cubes are hidden and ZERO is harassing the player while Amy tries to use them. The power cubes always appear in sets of four, each of them in a different color.
Power cubes are used to unlock blocked paths and doors within Hot Shelter. To unlock them, the player has to
pick up each of the power cubes in the area and put them into a nearby fixture that matches the power cube's color. Once all four power cubes are inserted, the path/door will be unlocked. If a power cube is inserted into a non-matching fixture, nothing will happen. However, if inserted or just placed in the proximity of a matching fixture, the power cube will automatically insert itself. While carrying a power cube, Amy's speed is lowered and her unique actions cannot be performed, such as her Hammer Attack and Hammer Jump.
Sonic Adventure DX: Director's Cut: Prima's Official Strategy Guide, page 99.
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Arm Punch | Bomb Attack | Bomb Gun Attack | Charge | Double Punch | Earthquake Attack | Electric Arm | Energy Ball Attack | Flame Thrower Attack | Guiding Missiles | Instantaneous Liquefaction | Laser Beam Attack | Homing Tail Slice | Inhale Attack | Marble Attack | Phantom Shadow Move | Punch | Quarter Attack | Scorpion Attack | Shockwave Attack ( Chaos 6) | Sonic Boom | Spin Attack | Spinning Spike Attack | Spouting Attack | Squash Roll Attack | Swing Punch
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Level Up Items Ancient Light | Crystal Ring | Fighting Gloves | Jet Anklet | Jet Booster | Laser Blaster | Life Belt | Light Speed Shoes | Long Hammer | Lure | Power Rod | Rhythm Badge | Shovel Claw | Warrior Feather
English voice actors
Ryan Drummond ( | Sonic) Corey Bringas ( | Tails) Michael McGaharn ( | Knuckles) Deem Bristow ( | Eggman) Jennifer Douillard ( | Amy) Jon St. John ( | Big) Elara Distler ( | Tikal, Station Square Train Voice, Default Menu Voice) Steve Broadie ( | Gamma, Pachacamac, Mystic Ruins Train Voice) Tomoko Sasaki (
Japanese voice actors
Jun'ichi Kanemaru ( | Sonic) Kazuki Hayashi ( | Tails) Nobutoshi Canna ( | Knuckles) Chikao Ōtsuka ( | Eggman) Taeko Kawata ( | Amy) Shun Yashiro ( | Big) Kaori Asoh ( | Tikal) Jōji Nakata ( | Gamma) Tōru Ōkawa ( | Pachacamac) Kaho Kōda (Station Square Train Voice) | Nobutoshi Canna (Mystic Ruins Train Voice) | Elara Distler (Default Menu Voice) | Tomoko Sasaki (
Believe In Myself | It Doesn't Matter | Lazy Days | My Sweet Passion | Open Your Heart | Unknown from M.E.
Sonic Adventure Original Sound Track (Digi-Log Conversation) | Sonic Adventure Remix | Sonic Adventure: Songs With Attitude Vocal Mini-Album | Sonic Adventure Original Soundtrack 20th Anniversary Edition | Passion & Pride: Anthems with Attitude from the Sonic Adventure Era
777 Slots Pinball | Angel Island | Auto Running | Black Market | Card & Pinball | Chao Garden ( Station Square Garden, Mystic Ruins Garden, Egg Carrier Island) | Chao Stadium | Chao in Space | Chao Machine | Chao Search* | Corkscrew loop | Debug Mode | E-100 Series | Egg Carrier | Egg Carrier 2 | Emerald Radar | Freeze | Life gauge | Mission Mode | Mystic Ruins | Shrine of Knuckles's race | Shuttle loop | | Sonic Adventure (LCD) Station Square | Station Square Police Department | Tails' Lab | Tornado | Tornado 2 | Transporter Machine
. Sonic Adventure DX: Director's Cut