Guilty Gear
In guilty gear there is a special usage for meter besides supers, and is one of the main draws of the games uniqueness.
Roman Cancelling
Tekken features a plethora of characters ranging from many different regions but the central conflict of the whole series revolves around a rivalry of two specific characters
Kazuya Mishima and Jin Kazama (will also accept Heihachi Mishima)
Street Fighter's titular protagonist Ryu uses a specific power to fight known as this.
The Satsui No Hado
2XKO has a different way of doing tag fighters by allowing the customizing of how you use your assists with this central mechanic.
Fuses
This series has been well known for its wide cast of characters from different IP's in a mega crossover platform fighter.
Super Smash Bros.
Bedman? Is a DLC character in Strive however the character is the bed itself being inhabited by the soul/consciousness of the brother of the little girl following it. This is that brothers name
Romeo
Tekken is famous for it's movement so much so that one of the main things practiced by new and intermediate players is this movement tech that allows for faster backwards movement.
Korean Backdash or Korean Backstep
Street fighter has had a big roster of villains and main bosses that headline the story of each game such as Bison and Gill, however street fighter V's main boss was added as a DLC character in the middle of it's life cycle.
G "the president of the earth"
2XKO's developers are known for being pro FGC players and as such put many references to other games including this chroma for Yasuo's base skin.
Akuma Chroma
Super smash bros has had a long history of competition behind it including a tournament win streak of 52 straight W's by this player.
ZeRo
Guilty Gear Xrd Rev 2 is one of the series most popular besides strive having different and unique uses for its mechanics including this one that will end the match upon landing.
IK's or instant kills
Wave dashing is pretty essential in Tekken however some characters have an extremely powerful tool following this wave dash mainly focused around the Mishimas.
Electric Wind God Fist
Super smash bros includes Ryu and Ken from the Street Fighter Series and even though their move sets have stayed pretty consistent throughout their life, the smash bros move set were inspired specifically from this game in the SF series
Street Fighter 4
Vi's Level 1 super is inspired by this MVC3 character being known to go so far as being the only invincible level 1 super in the game just as where it's inspired from.
Spencer's Bionic Arm
This series came to life from a Lawsuit Arc system works had to face preventing them from using the guilty gear IP and as such face many comparisons
BlazBlue
DAILY DOUBLE
Guilty Gear's lore is complex and wild including outlawing traditional technology and adopting magic as the central form of "tech". The being behind the introduction to magic is known as the original and was turned into this DLC character later in the lore.
Happy Chaos
Tekken pros come from all over the world however this legendary EVO run from this player put an entire REGION on the map and had pros from Korea and Japan flocking to it after the legendary EVO Japan W
Arslan Ash
Street fighter 2 got a HD remix and received this brand new super boss with it.
Violent Ken
2XKO is packed with FGC mechanics making it easy to pick up and difficult to master, this includes a tech that will allow you to perform moves with a character that you've just tagged out of
Programming
This relatively unknown 2D fighter has a host of indie crossover characters such as Shovel Knight, Isaac from the binding of Isaac and Quote from cave story
Blade Strangers
Normally in games with it the burst bar is used ONLY to burst out of combos (not including gold burst) but Guilty gear has these two extra uses that consume half of the burst gauge.
Deflect shield and Counter Blitz
In Tekken Tag tournament this character has an electric wind god fist that does less damage than every other EWGF if you max delay it and is considered a hidden nerf
In addition to Akuma this character has a two unique forms after performing a long easter egg taunt in SF6.
Ingrid
DAILY DOUBLE
2XKO'S sidekick fuse has a mechanic that used to be available on every fuse back in the first beta until it was removed and restricted to only said fuse.
Charged Assists
This MMO while it isn't a fighting game has a 2d fighter mode built into it that you can play upon buying a specific item from an NPC that is in the games HUB areas.
Warframe