2k1x is a series of games (episodes) for the SMBX2 fangame developed from 2015 to 2020. Below is a reference list to their placement in the series and links to downloads and further info. Rights to third-party assets belong to their respective owners.
Spring Festival (2015)
Merio must ascend the Tower of Biased to defeat the corrupt Joey.
Summer Takeover (2015, 2017)
After defeating Joey, the Tower self-destructs, and Merio & crew find themselves in a foreign land, seeking out the Wizard of EZ.
Hypnosis Redo (2016, 2020)
The crew takes a vacation after defeating the threat from Summer Takeover. Now, a new threat emerges, as the scheming Snivy Mortimer attempts to take over the world.
Subzero Heroes (2020)
Following the events of the 'evil' timeline in Hypnosis Redo, new heroes rise up to take back the lands from Mortimer!
Fall Calamity (2015)
Birthday episode for former lead developer Aristo.
Christmas Mini (2015)
Christmas-themed episode, featuring a novel coin-collecting style of gameplay.
May Havoc (2016)
Birthday episode for current lead developer Enjl.
December Collapse (2016)
Birthday episode for co-developer snoruntpyro.