question abt gideons lore and abt the places/bosses you tell him SPOILERS

so i just killed gideon after malenia but i have some questions

i told him about entering the  Mohgwyn Dynasty Mausoleum after i got there,then after killing mogh i told him.And i told him about entering the haligtree

then i went to ashen capital but didnt find gideon yet.THEN found and killed malenia and after all that did i find and killed gideon

1. my first question is : ik that in his fight he gets new moves based on what you tell him (like he gets bloodboon from mogh) but he had the spell from malenia where he turns into a flowers and slams down scarlet rot but i never tolk him abt killing malenia bc when i kille dher he was gone from roundtable,so how did he know?

2. even if i tell him everything,how does he learn those moves? like does he visit mogh and malenia and learns their magic? i dont think so

3 and he also had rykards flying red skull thing,but the thing is you couldnt tell him abt rykard (you can tell him abt visiting Mohgwyn Dynasty Mausoleum,killing mogh,visiting haligtree and killing malenia only those 4 ) so how did he also know that?