Could you please clarify one of these?

No confirmed series exists under this name. But the closest spiritual matches are “Suppose a Kid from the Last Dungeon Boonies…” or “Full Dive: This Ultimate Next-Gen Full Dive RPG Is Even Shittier than Real Life!” — both utter nonsense. Add a DJ deck and a bass boost, and you’ve got your “unce unce” isekai.

: Drawing inspiration from the literary nonsense genre—most famously exemplified by Alice's Adventures in Wonderland —these stories feature internal logic that is whimsical or contradictory, keeping both the character and the reader off-balance. Popular Examples in Media