Bowser Jr. artwork attribution

Nintendo retains the original character and artwork rights. The palette-indexed
frames reconstruct visible silhouettes from a Nintendo Unity gameplay recording;
they are authored adaptations, not an original sprite rip or recovered native
animation table. Motion, timing and collision values are authored implementation.
The circular fireball is an authored adaptation. No expanded rights are granted.

Credited recording:
https://www.youtube.com/watch?v=qa9CTjBgSYU
https://www.bilibili.com/video/BV1c6421f7ue/
