Black60Dragon | Level Thief: TAS PlayZ / TaSer / K.A.I.Z.O (Germany) @Black60Dragon | Uploaded October 2017 | Updated October 2024, 16 hours ago.
This guy has stolen multiple levels. The first one is almost literally block-for-block, aside from making a couple jumps easier.

The second one slightly changed a few jumps, again making it slightly easier, but it is clearly copied.

If you'd like to report the levels, here's the IDs

Level 1___________________
Original (Mike)
supermariomakerbookmark.nintendo.net/courses/A7BA-0000-01F3-D583

Stolen
supermariomakerbookmark.nintendo.net/courses/8884-0000-02C7-BBED

Level 2___________________
Original (Melody CLM)
supermariomakerbookmark.nintendo.net/courses/27BA-0000-0357-9B88

Stolen
supermariomakerbookmark.nintendo.net/courses/D5F3-0000-0366-CF91

Profile:
supermariomakerbookmark.nintendo.net/profile/Pascal0606

Miiverse Archive:
web.archive.org/web/20171008071513/miiverse.nintendo.net/users/Pascal0606