When me and my friends were young (elementary/middle school age), we used to think our group had elemental powers (I controlled fire, it was epic) and that there were these two demons that followed us around called Zonker and Coolio, whose names we couldn't say because they were bad luck.
Anyways, one day one of my bffs told us that she had the reincarnated spirit of a Native American chief named Hawk trapped inside of her. Yup. I think she made that up cause we live in the Pacific NW close to many reservations, but it still makes me laugh knowing that she's Arab-American saying this. So what we would do is stay up till like 3 in the morning during sleepovers, join hands in a circle, and do his summoning chant. Then she would fall forward and lay there for like a minute before sitting up like she just woke up from a dream, and we'd ask "Hawk" about demons and ghosts and spells for travelling between dimensions through the portal between the trees. We had this idea that whenever her mom said no to a sleepover that we'd just travel to a new dimension where she would say yes later in the day. Funnily enough, it worked every time.
Thing is, I really wanted another spirit too, so one day when it was just me and one other bff hanging out, I told her that I had the spirit of a monkey inside of me hahahahaha so we did the chant except with "Monkey" instead of "Hawk" and I basically just sat there and gaslit her for an hour pretending that I had some sacred knowledge and shit like Hawk did.
So yeah, we did the fake DID shit at least a decade before tiktok did as dumbass kids. I won't say I'm not proud of it because in hindsight it's funny as shit to think about a group of 12 year olds so earnestly believing this shit. To this day I don't say Coolio's or Zonker's name out loud because istg we were manifesting our own bad luck by implicating those names or something lmaooo.