(Note this is not a texture pack but a tool designed to make matoran skins)
Instruction:

-1.Open the main body file using a photo editing/pixel art program

-2.Paste the eye color of your choosing onto the main body file

-3.Paste the upper body armor onto the main body file and recolor it according to your liking

-4.Repeat step 3 except using the leg armor file

-5.Paste the mask of your choosing onto your skin file and recolor to your liking