So, yeah, I used the Max Swim stat AR code (1RG0-3EEQ-97BMQ;M8AD-3G6D-6CEUF;DUG4-2M9F-TTRWY;R57F-HH3V-RC0A7) and it says the code is invalid. I double-checked it, and no mistakes were found. So, I tried less entries. Turns out the only "valid" code is the very first one, and that doesn't do anything! I checked each one of my chao. Zip!
Also max one image in the signature.