Mechanics
Tag Mechanics
Assist
Whenever you're grounded and not stunned in any way, you can call one of 3 assist attacks from your assist character. These 3 assists represent the 3 special moves of your assist character.
Tag In
You can press Db at any time to switch characters. The previous character will perform a taunt similar to the animation they play after using an assist move.
Surge
Surge can be activated by pressing B#. Depending on the situation, it can have one of a few different effects.
Rage Surge
If activated during an attack, and while the opponent is in hitstun, it will cancel the attack immediately and lock the opponent into hitstop for 60 frames.
It will also reset the Infinite Prevention System the first time it is used during a combo. But the second time, it will give you a strike.
This is the only type of surge that costs one bar of meter.
Guard Surge
Using surge while in blockstun will push the opponent away immediately.
Burst Surge
Using surge while stuck in a combo will allow you to break out of the combo, flinging both players backward.
This doesn't cost any meter, but each character may only use this once per game.
Parry
You can press A# to enter a parry stance. While in the parry stance, all hits will be automatically blocked. Any hits you block in the parry stance will stun the attacker, leaving you at an advantage depending on the attack parried.
If the parry stance stays active for 30 frames without parrying anything, then you will be stunned instead, giving the opponent the ability to combo you.
Ultimate Blood Heat Overdrive
You can press D# to spend one bar of meter and activate Ultimate Blood Heat Overdrive. UBHO is a universal mechanic that turns every attack into a multihit that hits again for each frame it's active.
However it comes with a penalty to damage and meter gain on individual hits, making it not quite as powerful as it would seem at a glance.