Super Mario Bros. 3 (U) (PRG1) in
SUBNESHawk.
Reaches end cutscene. Has invisible credits though.
Explanation
Due to the DPCM glitch, a workaround was programmed into the game. It consists of rereading inputs until two consecutive inputs match. This can be abused by constantly changing input, leading to an overflow.
Similar to this.
Input
[Input]
LogKey:#Power|Reset|#P1 Up|P1 Down|P1 Left|P1 Right|P1 Start|P1 Select|P1 B|P1 A|#P2 Up|P2 Down|P2 Left|P2 Right|P2 Start|P2 Select|P2 B|P2 A|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|U...S..A|
|..|........|U...S..A|
|..|....S.B.|........|
|..|....S.B.|........|
|..|........|........|
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
<45 repititions of those 2 lines>
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
|..|........|.D.RS.B.|
|..|........|U.L..s.A|
|..|........|U.L..s..|
|..|........|........|
|..|........|........|
|..|........|........|
|..|........|U...Ss.A|
|..|........|U...Ss.A|
|..|U.L.S.B.|........|
|..|U.L.S.B.|........|
[/Input]