Decided to put this out for the world to see 
Press L+R+Z upon entering pipe leading to
the pit of 100 trials or any pipe in the pit
WARNING !!! DO NOT WARP TO A FLOOR ENDING IN 0 DIRECTLY; WARP TO A FLOOR ENDING IN 9 FIRST OR YOU WILL BE STUCK THERE (talking to Charlieton will crash the game)
0A3CA398 00000070
023DB6B8 000000XX
Replace XX with desired extension value
Values   Floor Number
62            99
61            98
60            97
5F            96
5E            95
5D            94
5C            93
5B            92
5A            91
59            90
58            89
57            88
56            87
55            86
54            85
53            84
52            83
51            82
50            81
4F            80
4E            79
4D            78
4C            77
4B            76
4A            75
49            74
48            73
47            72
46            71
45            70
44            69
43            68
42            67
41            66
40            65
3F            64
3E            63
3D            62
3C            61
3B            60
3A            59
39            58
38            57
37            56
36            55
35            54
34            53
33            52
32            51
31            50
30            49
2F            48
2E            47
2D            46
2C            45
2B            44
2A            43
29            42
28            41
27            40
26            39
25            38
24            37
23            36
22            35
21            34
20            33
1F            32
1E            31
1D            30
1C            29
1B            28
1A            27
19            26
18            25
17            24
16            23
15            22
14            21
13            20
12            19
11            18
10            17
0F            16
0E            15
0D            14
0C            13
0B            12
0A            11
09            10
08            09
07            08
06            07
05            06
04            05
03            04
02            03
01            02
00            01

Time to semi-legitimately hunt for All or Nothing, JumpMan, Hammerman and get a few level-ups
Also, there are more than 100 floors, but they contain Goombas and were never programmed to be battle-able, so attempting to first strike them will do nothing. i have not tested all of them yet though, so that still remains undiscovered... perhaps there could be some badges that were in the Pit of (more than) 100 Trials and were rendered inaccessible because of the Bonetail battle ?