Mario & Luigi: Paper Jam
Mario & Luigi: Paper Jam
Like Mario & Luigi: Dream Team, Paper Jam also had "Bros." added to its name in the UK release, again with no official reason given.

However, given that there are already two trademarks for "PaperJam" as well as a brand of toys that were sold in the UK under the name "Paper Jamz", it is more than likely Nintendo repeated the easier road by adding "Bros."
Paper Luigi was originally intended to be playable as well, but he ended up being excluded, because the game became too complicated with his implementation.
Contributed by CuriousUserX90
In the game’s files are unused text regarding Easy Mode.
Contributed by GamerBen144