A slight bug with the Wario Land HUD: On the second frame of GO, the time left increases by 1 second, only for that extra second to be lost on the very next tic.
Okay so battle mode with HP is bugged (I'd say a "base game bug", as this has happened with other mods too), but it always considers the lowest player number as the winner regardless of which player number survives
There is a bit of issue with the "Perfect Round System" - rounds sometimes end in a Perfect without the "Can Perfect" / "Go for Perfect" even appearing for the winning player at any point in the round (note that in normal cases, the "Can Perfect" still remains even after a round ends).
And also...
Umm, something is up with the Wario Land HUD. When the player is currently placed outside the top 3 while using the HUD, it will end in "rd", as in "4rd", though it is supposed to end in "th", as in "4th".