Some pet images have a 1px opaque border. I only figured this out b/c I figured it'd be fun to attempt to train HyperGAN with the pet images (rip me)
Pets affected (that I've found so far):
Angelic Torrent
Blacklight Harvester
Blacklight Lain
Blacklight Mortiking
Bloodred Cadogre (has second vertical opaque lines 2px in both sides)
Bloodred Donadak
Chibi Serpenth
Chibi Experiment
Chibi Experiment
Common Charlie (And probably all of the colourfills)
Common Experiment
Common Experiment
Common Experiment (Only top and left border)
Darkmatter Dragarth
Galactic Cadogre (Only top and bottom border)
Galactic Irion
Glacier Ghostly
Glacier Legeica
Glacier Zasaba
Glade Mortiking
Glade Serpenth
Graveyard Warador
Harvest Serpenth
Hydrus Popoko
Nightmare Harvester
Nightmare Lasirus
Nightmare Magnus
Nostalgic Aeanoid - I decided I wasn't gonna use the nostalgic after this so idk if there's more
Reborn Hikei
Reborn Magnus
Reborn Mortiking
Reborn Popoko
Reborn Warador
Steamwork Bumbus
Steamwork Escalade
Steamwork Harvester
Steamwork Mortiking
Storm Keeto
Storm Magnus
Storm Torrent
Sweetheart Aeanoid
Sweetheart Ghostly
Sweetheart Hikei
Sweetheart Hipottu
Sweetheart Magnus
Sweetheart Mortiking
Sweetheart Wyllop