This is pretty easy. First of all, your mom:
Just answer these questions one by one. I'm going to answer them in bold but you can decide your own:
Is your mom long furred or short furred? long-furred
Is her fur light, dark or average? dark
Is she fragile or strong? strong
Is she tall or small? small
Is she a tabby? no
Is her fur ragged, smooth or silky? smooth
Is her fur based off red(ginger, cream etc.) or black(chocolate, grey etc.)? red
How much white does she have(0-100%)? 20%
So using this particular form, my mom is a long-furred self-cat. She is small but strong and her pelt is based off red. She has barely any white.
I'm going to make her russet, which is dark and based off red.
Please ask if you would like to know which fur colours fit into which category.
Now do exactly the same for your dad.
I'm randomly going to say that my dad is a short-furred tabby. He is strong and average-size and his fur is average and based off black. He has 70% white.
I'm going to make his fur grey, which is based off black.
Now add a few markings! I just realized that my mom isn't possible, all ginger cats are tabbies. So my mom becomes a tabby too! Try to find a cat(any cat) who looks like your 'parents' so that you can check if your combination is possible. Also base your eyes off this image- if I google 'russet cat', I find that they mostly have amber, orange, yellow or yellow-green eyes. So I'll give my mom amber eyes. My dad, on the other hand, is going to have pale green-grey eyes.
Remember to keep your parents realistic! No rainbow cats, please!

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How to make a warrior cat OC(improved version)
FanfictionNote: This was written a long time ago, please see the Note chapter for more details -March 2023 This is a fool proof method for making an OC you will never forget! Enjoy making a personal cat with a detailed history and amazing personality traits t...