Star Trek: Lower Decks introduced some great new characters who, with a little tweaking, could fit into the larger universe, but one particular figure would be far too weird if they crossed over into another Star Trek project. Of course, Lower Decks didn't just focus on original characters. The animated comedy also brought several icons back to the franchise, some of whom hadn't reprised their Star Trek roles for decades. Lower Decks thrived on being modern Star Trek's hotbed of classic-era easter eggs, but it didn't just limit itself to being a nostalgia fest.
Set in the heart of the Star Trek timeline, Lower Decks remains one of the most unique Star Trek TV shows. Although it officially added to the main canon with each passing second, it also felt like a Star Trek parody at times, lovingly poking fun at all corners of the franchise. Regardless, it was part of the main continuity, a fact that was reinforced by its Star Trek: Strange New Worlds crossover episode, "Those Old Scientists." Strange New Worlds had to blunt certain edges of Lower Decks for the collaboration to work, but that wouldn't always be enough.
Badgey Appearing In Star Trek Shows Other Than Lower Decks Would Be Very Weird
Rutherford's rogue hologram only works in Lower Decks
Badgey (Jack McBrayer) is a Starfleet training hologram programmed by Ensign Sam Rutherford (Eugene Cordero). Although he initially functioned as intended, he ended up gaining sentience, going rogue, and becoming a bad guy. On paper, Badgey sounds like a textbook Star Trek villain, as several holodeck mishaps have occurred across the franchise. However, the fact that he's a giant, anthropomorphized Starfleet badge makes him stand out quite significantly in this particular category of Star Trek bad guys.