Tails' Lab is a fighting arena in Sonic Battle. It is treated as Tails' home arena.
Hence its name, Tails' Lab is Tails' personal laboratory which resides in Emerald Town. Here, Tails not only conducts his research, but also uses it as a training ground throughout the story. In Sonic's episode, it is the first location where the heroes are attacked by Dr. Eggman's Phi-series robots. Knuckles would later come here in his episode to go a few rounds with Emerl before going to Night Babylon to investigate a Phi sighting. Later, Emerl can return here to partake in Virtual Training.
As an arena, Tails' Lab is laid out in a square shape across a floor consisting mostly of metallic panels. The center of the arena, which has a large blue circle on the floor, is very open, encouraging all-out aggressive play. The northwest and southeast corners of the arena have large turbine-like blocks that can be used as cover.