Source:
https://www.smbxgame.com/forums/viewtopic.php?f=36&t=4237
Author:
zioy

Description:
This was my first-ever fully-blown completed project, I made it back on NSMBX. It has crappy level design but is still actually pretty fun. Here's the original post.

    KoolKatGold wrote:
    Hey, KoolKat here! This was my first project.
    Story:
    Bowser has kidnapped the princess (again) and has sent his minions to stop Mario, Luigi and Toad from getting her back! (Not very original)

    Mushroom Kingdom:
    Bowser knows how to be strategic. He has his cave all the way in Icy Bowser Land, while Mario starts his journey all the way in Mushroom Grass Fields.
    World 1: Mushroom Grass Fields
    World 2: Spiny Sand Dunes
    World 3: Yoshi Jungle
    World 4: Lakitu Skies
    World 5: Cheep Cheep Beach
    World 6: Icy Bowser Land

    Bosses:
    World 1 Fortress: Boom Boom
    World 1 Castle: Larry Koopa
    World 2 Fortress: Boom Boom
    World 2 Castle: Lemmy Koopa
    World 3 Fortress: Boom Boom
    World 3 Castle: Iggy Koopa
    World 4 Fortress: Bowser Jr.
    World 4 Castle: Ludwig Von Koopa
    World 5 Airship: Blu Bros.
    World 5 Fortress: Bowser Jr.
    World 5 Castle: Wendy O. Koopa
    World 6 Fortress: Bowser Jr. AND Boom Boom (When the last one is down to 1 hit left, don't hit the time switch or the level will be broken)
    World 6 Bowser Cave: Bowser

    Screenshots!
    Please not that these are in alphabetical order, not the order the levels are in.
    Spoiler: show
    Download!
    http://www.mediafire.com/?3x2396hk31g7e9p

    Credit to Redigit, YoshiQuest, and Valtteri for graphics.

    Character Artwork:
    Blu Bros.
    Image
    This is Paper Mario gfx with my touch :D

    Some Koopalings are unused, but will be used in DLC's.

    This game's Difficulty is 4-6/10, and it is very short (46 levels and a toad house). This is perfect for my nephew (6 years old), newcomers, or people looking for a Mario themed way to cool down.

    Blu Bros. Info:
    They are hammer bros that throw flying hammers. If you wait long enough, they will line up so as to take them both out with one ice block in their airship.