Here is just my list of tips of how to avoid creating/writing a Mary-Sue character. Take them as you wish.
Greatest Achievements: #1 in non-fiction!!!
One of my oc's have a sorta op ability but she doesn't even bother to help out the other characters because shed rather be in her room, roaming the internet
Is it bad that I'm actually reading this TO make a
Mary-Sue story? 😅😭 only I'm not gonna go full blow Mary, Imma keep it chill 😌😂😂 and semi realistic 😋
i'm tired of seeing
'shadow, 16, has teleportation, devil,angel,healing powers
is nice to everyone and hates bad things'
'daughter of (insert fictional god here)'
Like stepping on a Lego for fun power!
Wait that's insanity.
I would be careful about using Wikipedia as a research source, but other than that I've found this article very helpful.
I'm glad someone finally created a guide to character development for Wattpad 😆