Academy Codes

I am new to learning all these codes and what goes with what and how many series is out and what other things Doorables has such as the movie moments. Squishalots and just soooo much more that they offer. I really like this academy one. Not sure how to set him up but I got stitch and was wondering where are the codes for these or is there one? My friend told me the Just play brand or whatever it is doesn’t have them? Is that true? I would like to get more of these but struggling to find a code. This came from Amazon. Thank you. Idk how you all keep this information in order. I got a headache already and it’s 9:30am😂I find myself buying doubles cause of the codes and not knowing them and I don’t understand the spreadsheet that was posted. So, I would appreciate any help. Thank you!