Knuckles is an enemy who wants to steal the Chaos Emeralds in Sonic The Hedgehog 3 / Sonic 3 And Knuckles (Sega Genesis)! In Hidden Palace Zone (Sonic And Knuckles / Sonic 3 And Knuckles), Sonic and Tails fight against Knuckles and then all of sudden, Dr Robotnik steals the Master Emerald. Now Knuckles is on Sonic's side and he told Sonic and Tails to find the way to the Death Egg Zone and stop letting Robotnik get away. In Sonic Heroes, Sonic is a Speed Formation (Blue) to make it run faster, jump dashing and homing attacks and rolling forwards and Rocket Accel, Tails is a Fly Formation (Yellow) to go up while flying, thunder shooting and throw dummy rings, and finally Knuckles is a Power Formation (Red) and he is going to punch these enemies and use Sonic and Tails Fireballs and he throws Two Fireballs (Sonic & Tails) and a ground punch to make an earthquake.
Your picture was not so bad at all! Good picture!