Mechas are what the game is about, every character in MechQuest owns at least one mecha. Your mecha is a giant battle machine that is used to fight in MechQuest, you can arm it with a head, a front arm, a back arm, a front shoulder, a back shoulder and a body weapon. Not every mech can use all these places for weapons. For example, some can't use the front shoulder, some can't use the body and so on. it all depends on your mech.
Every mech has default weapons that come together with your mecha that you won't need to buy. Also, every mecha uses three important factors; health points, which determines when you lose a battle, energy points, that determines which weapons you can use, and regain, that makes you recover energy points. These are often marked references for as HP, EP and regain.