While looking through my Ruby version's box, I found my Marshtomp and Swampert that were traded from the same original trainer in my Sapphire version. I assumed Marshtomp was the child of Swampert, but when I looked at the summaries, Marshtomp's memo said "BASHFUL nature, Lv5, ROUTE 117 (met).", while Swampert's said "CALM nature, Lv5, ROUTE 101 (met)." This is impossible. The Marshtomp has to say '(egg)' in the memo, both can't be met in the same file, since they're starter Pokémon. And no, I haven't used a cheating device.