>writing fanficshttps://archive.is/zTI9TBulbapedo page of official tournaments, of which Sleep Clause was a rule when Single Battles were the tournament format.
If not wanting to look or are a lazy faggot here is a list official tournaments that had Sleep Clause:
Singles
>nintendo cup '97>nintendo cup '98>nintendo cup '99>tournament during the 2000 stadium tour>2000 world championship>tournament in france by french fansites, but sponsored by nintendo and bandai in 2005>emerald ultimate frontier brain tournament in 2005Doubles
>tournament during pokemon festa 2004 >tournament during pokemon festa 2005>tournament during journey across america 2006It was also a clause in Battle Revolution, an official Pokemon product that had several other clauses that could be applied to multiplayer battles.
>pedo page of battle revolution options https://archive.vn/LCcpG 