Caveman Warriors

Level 6 is the first one that takes place in the future and for the most part is the same as what you've already encountered previously, just with a different look to the stage and enemies to a war torn area and soldiers. The boss of the area is Jandro XL, a robotic vehicle enemy piloted by a soldier. He has 3 different forms that you need to defeat.

His first form is the robotic vehicle with a jet on its back. It will jump towards one side of the screen while shooting a flame burst out of its jet. If it hits you or the flame burst does, you will take damage, so just move around under it when it jumps. For its second form, it will grow arms with blades on the end and dash across the screen with them spinning in front of it. To avoid this, just stand someplace around the middle of the stage and duck as it will go over you. The final form is where the robot turns into a spider and walks across the stage, jamming one of its legs down at you trying to hit you, before firing out a flame burst directly under its body. To avoid this you just need to run towards it and under it so its legs don't hit you, then move to the side a little so the flame doesn't as well.

The best method to beat the boss is to jump and land a single attack on the boss then move away to avoid the jump. If it turns back towards you, do another jump attack to him and run away. Keep rinsing and repeating those steps until he moves on to the next form. For the blade arm one, just duck down until it goes over you and then start attacking quickly when it lands on the ground in one of the corners until it changes into the final form. For the final form, run at it and under the first leg attack, move back towards the front of it to the ball section of that leg so you will miss the flame burst and then jump straight up and hit it once (twice if you can). After the flame burst, stay under the legs/body and head towards the back leg and before you get to it start heading back towards the front (repeating that motion if the back leg doesn't come down the first try). Once the leg does its attack, go back to the front ball of the one leg and repeat the process. Keep doing this method until he is dead.

Once you finish off the boss and the stage is over, the trophy will pop.

Extra Level Note: Both extra levels in normal & arcade have the same bosses as their regular versions with the same patterns, but the stages leading up to them are set up different and slightly more challenging. Their battery locations are also in different locations.