When the level first starts, go to the left and get the first gem, then turn completely around and go to the end of the corridor to get the next gem. Before getting the second gem sneak up to the corner and ambush the Gun Turret.
Continue straight to the next gem, and then to the fourth. After the fourth gem continue straight until you get to the open space on the right. There should be a Wakka and three gems in there. The first two are easy to find, they are in the two far corners. But the last is in a small dead end under the elevator.
Continue up the ramp to the next level with the fast moving platform. Shoot one of the Mines to set off a chain reaction that will destroy the rest of them. Try not to get hit by the shrapnel or the fast moving platform. Get the gem and the Minigun on that level and head back to the ramp. Go down the ramp and to the left to get into the other open space with two gems a Wakka. Go up the next level and collect all of the gems and proceed to the next level by use of the elevator. Collect all of the gems on the highest level and go back down to the bottom. Watch out for the shrapnel from the Bombers while on the top level.
When you get back down to the bottom, make your way through the electric barrier and into the maze section of this arena. First head to the right to get the gem, then over to the blue box that contains a Laser. Next head to the left and around the corner to the left to get the Homing Missile. There is a gem hidden in the back right corner.
Back track and get the Bounce Ammo. Don't get the purple gem quite yet. There are two Gun Turrets waiting around the corner. Equip the Homing Missiles and destroy them from around the corner before going for the gem. Continue to the gem that is by where the Gun Turrets were and make your way to the right.
Pick-up a gem on the left at the next turn. Take the next left around to the left, picking-up the
Bounce Ammo on the right if you want, but you won't need it since you are close to the end. Keep
going around to the left and get the last gem in the far corner then turn around and go down the
corridor to the right and make one last right to get to the exit
block
.