This a 90% custom Luigi from SMB1 on the NES. Since Super Mario Maker 2's Luigi looks WAY too identical to Mario, except for green coloring, I decided to create Luigi based off of Mario's sprite. As a bonus, it also includes Small Mario and Small Luigi crouching, and fronts for both Mario and Luigi. Credit to M4R1O for the tiles, blue and red Mario, and the pipe. Give credit, never steal, and have a good day.
---UPDATE JULY 12, 2019---
*Added Super Mario Maker 2's Fire Luigi
*Added four 3-color palettes
*Adjusted mustache and hair on Small Luigi
Sprites and animation frames saved in a static image medium.
Modification of existing sprites.
Added Super Mario Maker 2's Fire Luigi, added 3-color palettes for Mario, Luigi, Fire Luigi and Alt. Fire Luigi, and fixed Small Luigi.