Tails' Lab, also known as Tails' Workshop or Tails' House, is Tails' basic operating location which he uses to construct his inventions. It also functions as his second home, where he usually can be found hard at work. In most games, the workshop's main purpose is to store the Tornado, a plane owned by Sonic until Tails possibly got it as his own.
The first operating related function is seen in Tails Adventure. Since then the location or even the appearance of the workshop has been different in every appearance it has made. Tails either has many of these workshops or moves the same one from place to place, as it is never in the same location in the games.
The first time Tails had an operating location is in Tails Adventure, where it is named Tails' House (テイルスハウス,Teirusuhausu?). It serves as Tails' base and home on the south shore of Cocoa Island. The Japanese instruction manual states the game taking place before Tails met Sonic in Sonic the Hedgehog 2 as the house could be his temporal living place. However, the English instruction manual has its own variation, stating the game taking place after Sonic the Hedgehog 2 and describing Tails being on vacation at the his favorite holiday spot (dubbing it "Tails Island"). It is a small house with a hammock being set on the yard. The house has two main rooms for different purposes.
During Tails Adventure, Tails' house operates as a hub for swapping equipment and other mundane affairs, but not as a full playable stage. There also is the research lab where the Sea Fox is stored and is the place where the player can equip it.
Sonic the Fighters
The second, different operating lab is only seen at the intro demo and preclude scene of the Death Egg II fights in Sonic the Fighters, where it is located on the beach of an undisclosed tropical island. It is large grey house with yellow roof with large satellite on it, which can be utilized to get signals from the space. It has the large door of round shaped Tails' tails symbol on it. The Tornado is seen parked right next to the lab. The front yard has round launch area.
The inside of the lab is actually a large storage area and launchpad for the Lunar Fox. There are seen boxes and large computer table connected to the satellite on the roof. The upper layer leads to the cockpit of Lunar Fox. In the game, Sonic and Tails notices the terror of Death Egg II and tries to get eight Chaos Emeralds to power source of Lunar Fox. After for doing that, Lunar Fox is then moved to the outside to the round launch state and thus launched to the Death Egg II.
A similar workshop owned by Tails is seen in Sonic Adventure, this time located at the Mystic Ruins, close to the Angel Island (which is located in the air before landing) and a wooden train station tower, that leads to Station Square. It is very similar to the one from Sonic the Fighters with the exception of it its size and having a separate small apartment on the top. It is seen that the workshop is powered with hydro power, as the generator is rotating next to the workshop. The player is only able to go to the small hall, where the first Tornado is always parked.
During the game, Sonic and Tails have to collect a crystal item on a small staircase of the workshop's door to access Windy Valley. As Eggman gets away with the Egg Carrier, after getting the fourth Chaos Emerald, Tails engages the airfield on the peninsula to launch the Tornado into the air. The small walking path disappears and the palm trees get moved horizontally while the airfield rises from below. After Sky Chase becomes a failure with the Tornado getting destroyed and the duo becoming separated, Tails got another Chaos Emerald, proceeding to build another Tornado at the workshop. Tails uses a separate launch tunnel for this new Tornado. It is located underground, leading out from beneath the waterfall near the workshop.
In Sonic Battle, Tails' Workshop is separate from Tails' House, although both are located in Emerald Town. The lab contains a battle arena and a training area, as well as computers which fail in analyzing Emerl.
Tails' Workshop appears in Sonic Battle as his battle area when Emerl is chosen to train with him in the story mode. It also has a unique Virtual Training mode to truly test the Gizoid's abilities. The arena is almost entirely open, with only a few cylinders in the corners.
In the game, the workshop serves as the team's first stronghold. Here, it serves as a rest stop so that the team can rest and replenish their HP and PP to full health after a battle. In the game, there are other strongholds that also serve this purpose.
Sonic Lost World
Tails' Lab reappears on the Nintendo 3DS version of Sonic Lost World. By collecting certain items, Tails can build items and RC vehicles that can be sent to the Wii U version of the game and controlled by a second player. The RC vehicles can assist Sonic in co-op mode by collecting Rings and other items while he progresses through the stage.
Apperances in other media
Sonic the Hedgehog: The Movie
Dwelling place of Sonic and Tails is seen at one of the floating islands at Land of the Sky in Sonic the Hedgehog: The Movie. The island has ruins of a crashed Boeing 747 and USS Enterprise, that have workshop inside, where Tails works. It is seen to have satellite to take radio signals.
During the Chaos Saga of the anime series Sonic X, it is seen that Tails does have his own workshop at Mystic Ruins. He is seen living there for while since all of the main characters got separated after their latest conformation with Dr. Eggman.
Tails' workshop in Coca Island appears in the Sonic Universe arc "The Tails Adventure" (issues #17-20), which is based on the game itself.
In the Sonic Boom franchise, Tails has his own workshop next to his house on Seaside Coast. Here, Tails spends his time building the inventions furnishing his mind to not only give his team the edge but also make life easier.
In Tails' Workshop in Sonic Chronicles: The Dark Brotherhood, there seems to be a pot with a sprout inside it. According to rumors, this is a possible reference to the seed Sonic found when Cosmo died in the anime series Sonic X.
The music that plays in the Sonic Battle version is remixed for the background music of Route 99 in Sonic Advance 3.