Used original 1988 Michaelangelo figure and customized it to look like his appearance in the original 1987 cartoon. Used Aves Apoxie Sculpt to fill in areas of the front and back of the shell, and changed the pattern on the back of the shell to match the cartoon. Sculpted a new belt directly onto the figure, in a lower position so that more of the upper body is showing above the belt line, like in the cartoon. Also added the missing teeth on the empty side of his mouth. Made Nunchucks look more wooden. Then completely repainted the figure and Nunchucks.
Update: I have sculpted an entirely new shell/belt onto the old one using Aves apoxie sculpt, upon realizing that on the cartoon the turtles have larger shells that can actually be seen over their shoulders. Also cut off the veins on the arms/forearms and covered the toenails with Aves apoxie sculpt. Then repainted the figure. Also made new nunchakus for Michaelangelo, made out of Donetallo Bo Staff pieces, chain, screw eyes, Aves apoxie sculpt, and paint. I made 2 of them but only one is shown in the pics since he's holding it with both hands, looks better for posing. Added new pics for the update.