I am looking for version (custom/beta?) of portable python that is python 3.x and includes pygame.  I know pygame hasn't been fully converted to 3.x yet, but for what I need it for it works perfectly.
Install Pygame, then take your entire Python folder and put it where you want it to go.
If you mean you want to be able to use python (filename).py on the terminal, then you will have to change the PATH variable in the terminal, or add the shebang line #!usr\bin\python onto your programs.
portable python 3.x and pygame