The Smosh Games Crew was the name given to the official cast of Smosh Games. They hosted and appeared in all series on the channel (with the exception of Shayne co-hosting The Damien & Shayne Show during its run).
Since the bankruptcy of Defy Media and the subsequent acquisition of Smosh by Mythical Entertainment, the group name of "Smosh Games Crew" is essentially obsolete, as the Smosh Family is integrating the entire cast of Smosh together under one umbrella.
Mari was originally an official cast member of Smosh 2nd Channel as the host of Smosh Pit Weekly until its cancellation in 2015, but returned to the position in 2017 almost immediately after the channel changed its name to "Smosh Pit". Fellow Smosh Games member Damien Haas and Smosh Squad member Shayne Topp replaced her after she abruptly left the position for good in January 2018 (possibly due to preparations for her wedding, which was held in April that year).
By default, Mari is the only Smosh Games member to have had a different featured role on Smosh prior to joining. Wes and Flitz also started out with different roles, but worked behind the scenes rather than on-camera.
Before this, they all spent time working for another YouTube brand called Mahalo, where Wes and Flitz also worked at the same time.
After officially stepping away from Smosh in 2017, Sohinki and Lasercorn became founding members of their channel ToasterGhost, along with Pamela Horton (Ian's former girlfriend) and YouTube cosplayer Amy Lynn. This channel has been inactive since early 2019.
In January 2018, Flitz abruptly left Smosh Games order to legally deal with allegations against him of sexual assault, without risking a potential negative impact on the rest of the Smosh cast and crew.
In January 2019, in the aftermath of Defy Media's shutdown, Boze officially left Smosh Games (having already taken a job in digital marketing) and indicated that she would likely not appear with the Smosh Games cast again even if the channel reemerged under Mythical Entertainment's management (which it later did).
In the comments of a video released on The Jovenshire, Joven responded to many fans' comments with the news that he, Sohinki and Wes would not be returning to Smosh Games, with this video being released on the same day as the Smosh Games reboot.
All three were later announced as part-time Smosh Family members, with Joven and Wes making occasional appearances in videos since then (notably including Smosh Summer Games: Apocalypse). However, despite officially still being a part of Smosh, Sohinki has not made an appearance on any channel since 2018.
Since the shutdown of Defy in 2018, the lineup for Smosh Games videos has changed considerably. Instead of having set "Smosh Games members" in every video, a wider range of the Smosh Fam have participated, with the intention of blurring the lines set between the Smosh Games Crew, the Smosh Squad and even the crew members.