Twice Twice is a term to describe a troll level design in Super Mario Maker and in other Mario game romhacking where the assets of two or more sections of a level are superficially the same, but upon accessing them, it has different features
like pipes and doors that are rendered inaccessible,
new hidden traps and enemies, question blocks that yield enemies rather than
power-ups, all that are not immediately apparent at first glance.
As such, this might make the player unable to run through the
new section using the methods employed for the old one, and cost them
time and lives while tracing the
new course. Because of its ambivalent nature, the Twice Twice can make the player assume two things: first, that the level sent them to square one (see CP1), or second, that the level is
indeed different and that they should tread carefully.
