There are three playable characters in SRB2, as well as a few non-playable characters. They each have their own advantages and disadvantages, and end up balancing themselves up both in Single Player and in multiplayer gametypes. This article describes the characters that are default in SRB2.
Sonic the Hedgehog
Sonic is the quickest of all three playable characters, but he's the least versatile. Some areas will be inaccessible to him, so he must find other routes around them. He's also somewhat difficult to control, but to adjust to his controls would make him a powerful asset to the player. His ability is the double-jump "Air Spin Attack", more commonly known as the "thok," due to the sound it makes. The thok gives the player a burst of speed, which is useful for clearing certain gaps and automatically giving acceleration. Sonic also has the added ability of turning into Super Sonic when he has seven Chaos Emeralds; this special ability makes him faster, stronger, and completely invincible for a certain amount of time.
|Special Abilities||Single Player/Coop/Race Super Transform; Thok and Float in Super|
|Movement||Acceleration [40, low]; Thrustfactor [5, high]; Accelstart [96, low]|
Miles "Tails" Prower
Although Tails is the slowest of the three playable characters, he does possess the very powerful flying ability. This allows him to clear long jumps and reach new areas at a great convenience. His speed and handling are very easy to control, making him ideal for the beginning player.
|Special Abilities||Infinite Fly/Swim while Super; Extreme Whirlwind Jump while Super|
|Movement||Acceleration [50, high]; Thrustfactor [3, low]; Accelstart [192, high]|
Knuckles the Echidna
Knuckles can be considered the "moderate" character of the three. While he's not as fast as Sonic, he is faster than Tails. With this speed, he also has Tails' good handling. He has the ability to glide and climb, allowing him to scale gaps and walls with ease, possibly reaching new areas that Sonic can't reach. His jump height of 85 fracunits is lower than Sonic and Tails' 100 fracunit jump, which can put him at a disadvantage in certain situations.
|Abilities||Glide; Climb; Spindash|
|Special Abilities||Breaks rocks on contact; Shoots rings 1.5x faster in Multiplayer (2x for the Automatic Ring and Grenade Ring); Can multiglide while Super|
|Movement||Acceleration [45, medium]; Thrustfactor [4, medium]; Accelstart [128, medium])|
While not playable, non-playable characters serve as an asset to the game's plot.
The evil mad scientist, Dr. Eggman, is back, and he's ready to dish out his evil plans against our three heroes! This time, he's harvesting the power of the Black Rock, which he believes will allow him to launch robot armies and attack the world, unopposed!
In the game, he serves as the boss at the end of each zone.