Flame Mammoth stage
Go until reaching the little opponents that throw the picks at you. Instead of going to the exit, go up the platforms until you reach the extra life. Dash left and jump to find an E-tank.

Storm Eagle stage
Go to the part just before the hover platforms. When you see the opponent on the rising platform, kill it. Ride the platform to the building in the air, and shoot through the glass.

Armored Armadillo stage
When you reach the first cliff with the miner machine, set the machine off, climb the wall, and run to where the machine started.

Spark Mandrill stage
You will need to get the Boomerang Cutters first. Go to where you can climb a ladder up or down. Go down and destroy the defense units. Do not go up the next ladder. Instead, equip your Boomerangs and jump straight into the air and fire one. It will catch the E- tank and return it to you.