4D6, keep any 3 you want, place in stats as desired.
If you get a 16, 17, or 18, remember to roll an additional D6 and add it. Don’t use the 4th D6 from the original roll.
For RCCs with differing amounts of D6 for each stat, roll an additional D6 and drop one for each stat, but they must be placed where they were rolled.
The rules for creating a Yoshugoku spirit are effectively the same for making a TMNT character and then turning it into an MDC creature with supernatural strength.
Each character may start with 3 points in backgrounds.