TheGreatRambler/mm2_ninji

Mario Maker 2 ninjis

Part of the Mario Maker 2 Dataset Collection

Dataset Description

The Mario Maker 2 ninjis dataset consists of 3 million ninji replays from Nintendo's online service totaling around 12.5GB of data. The dataset was created using the self-hosted Mario Maker 2 api over the course of 1 month in February 2022.

How to use it

The Mario Maker 2 ninjis dataset is a very large dataset so for most use cases it is recommended to make use of the streaming API of datasets. You can load and iterate through the dataset with the following code:

from datasets import load_dataset

ds = load_dataset("TheGreatRambler/mm2_ninji", streaming=True, split="train")
print(next(iter(ds)))

#OUTPUT:
{
 'data_id': 12171034,
 'pid': '4748613890518923485',
 'time': 83388,
 'replay': [some binary data]
}

Each row is a ninji run in the level denoted by the data_id done by the player denoted by the pid, The length of this ninji run is time in milliseconds.

replay is a gzip compressed binary file format describing the animation frames and coordinates of the player throughout the run. Parsing the replay is as follows:

from datasets import load_dataset
import zlib
import struct

ds = load_dataset("TheGreatRambler/mm2_ninji", streaming=True, split="train")
row = next(iter(ds))
replay = zlib.decompress(row["replay"])

frames = struct.unpack(">I", replay[0x10:0x14])[0]
character = replay[0x14]

character_mapping = {
    0: "Mario",
    1: "Luigi",
    2: "Toad",
    3: "Toadette"
}

# player_state is between 0 and 14 and varies between gamestyles
# as outlined below. Determining the gamestyle of a particular run
# and rendering the level being played requires TheGreatRambler/mm2_ninji_level
player_state_base = {
    0: "Run/Walk",
    1: "Jump",
    2: "Swim",
    3: "Climbing",
    5: "Sliding",
    7: "Dry bones shell",
    8: "Clown car",
    9: "Cloud",
    10: "Boot",
    11: "Walking cat"
}

player_state_nsmbu = {
    4: "Sliding",
    6: "Turnaround",
    10: "Yoshi",
    12: "Acorn suit",
    13: "Propeller active",
    14: "Propeller neutral"
}

player_state_sm3dw = {
    4: "Sliding",
    6: "Turnaround",
    7: "Clear pipe",
    8: "Cat down attack",
    13: "Propeller active",
    14: "Propeller neutral"
}

player_state_smb1 = {
    4: "Link down slash",
    5: "Crouching"
}

player_state_smw = {
    10: "Yoshi",
    12: "Cape"
}

print("Frames: %d\nCharacter: %s" % (frames, character_mapping[character]))

current_offset = 0x3C
# Ninji updates are reported every 4 frames
for i in range((frames + 2) // 4):
    flags = replay[current_offset] >> 4
    player_state = replay[current_offset] & 0x0F
    current_offset += 1

    x = struct.unpack("<H", replay[current_offset:current_offset + 2])[0]
    current_offset += 2
    y = struct.unpack("<H", replay[current_offset:current_offset + 2])[0]
    current_offset += 2

    if flags & 0b00000110:
        unk1 = replay[current_offset]
        current_offset += 1

    in_subworld = flags & 0b00001000

    print("Frame %d:\n    Flags: %s,\n    Animation state: %d,\n    X: %d,\n    Y: %d,\n    In subworld: %s"
        % (i, bin(flags), player_state, x, y, in_subworld))

#OUTPUT:
Frames: 5006
Character: Mario
Frame 0:
    Flags: 0b0,
    Animation state: 0,
    X: 2672,
    Y: 2288,
    In subworld: 0
Frame 1:
    Flags: 0b0,
    Animation state: 0,
    X: 2682,
    Y: 2288,
    In subworld: 0
Frame 2:
    Flags: 0b0,
    Animation state: 0,
    X: 2716,
    Y: 2288,
    In subworld: 0
...
Frame 1249:
    Flags: 0b0,
    Animation state: 1,
    X: 59095,
    Y: 3749,
    In subworld: 0
Frame 1250:
    Flags: 0b0,
    Animation state: 1,
    X: 59246,
    Y: 3797,
    In subworld: 0
Frame 1251:
    Flags: 0b0,
    Animation state: 1,
    X: 59402,
    Y: 3769,
    In subworld: 0

You can also download the full dataset. Note that this will download ~12.5GB:

ds = load_dataset("TheGreatRambler/mm2_ninji", split="train")

Data Structure

Data Instances

{
 'data_id': 12171034,
 'pid': '4748613890518923485',
 'time': 83388,
 'replay': [some binary data]
}

Data Fields

Field	Type	Description
data_id	int	The data ID of the level this run occured in
pid	string	Player ID of the player
time	int	Length in milliseconds of the run
replay	bytes	Replay file of this run

Data Splits

The dataset only contains a train split.

Dataset Creation

The dataset was created over a little more than a month in Febuary 2022 using the self hosted Mario Maker 2 api. As requests made to Nintendo's servers require authentication the process had to be done with upmost care and limiting download speed as to not overload the API and risk a ban. There are no intentions to create an updated release of this dataset.

Considerations for Using the Data

The dataset contains no harmful language or depictions.