Should be fixed now, resizes one of the sprites that was too big and aligned them all to a grid. Let me know if anything else is wrong and thanks for the feedback.
https://themightypalm.itch.io/mighty-pocket-pack This pack contains a bunch of mons, and the creator is working on more. I do believe he is working on back sprites too but I cant guarrantee it, he has already made some tho so i think its safe to assume.