Tackling is preformed by taping the triangle button while on the ground. Your mobile suit will dash forward and tackle another mobile suit with its shoulder. You have invisibility frames on startup and throughout the tackle animation, once your mobile suit starts to regain its balance you will be vulnerable again. Using a tackle will overheat your thrusters, so be careful because you will not be able to cancel the animation during recovery like most other attacks. You can also Counter the melee attacks of enemies if you are able to have your tackle connect with your enemy at the same that it is swinging its melee weapon.