If you want to improve even a little in SONIC.exe sprites, well I could give you some suggestions, the tutorial may lack steps or suggestions, but I think it is already a complete and animated tutorial, as I mentioned, I will put the source of each material used in the above .txt file, because it's too long for youtube:
cdn.discordapp.com/attachments/783802345351676026/787470455602151464/credits.txt
TIME STAMPS:
0:00 Introduction
1:06 Eyes and pupils
2:03 Snout and blood
2:36 Style rules
3:02 Poses
3:10 SONIC.exe Gameplay
3:34 Poses (Part 2)
4:15 Additional Tips
4:32 Ending