Here are My Fic reccomendations for Harry Potter/Percy Jackson crossovers.
Half-breeds at hogwarts by The King of Hades
Percy Jackson and Friends go to Hogwarts by percabeth1643
Not Over Yet by AlaudeWolframDavenport
Demigods and Wizards at Facebook? Safe yourself! by DWGolondor
Don't even go there Unless you want me to tell you about my life… by elfqueen13
Whaaaat? by Winter Jackson
Mightier Than The Quill by The Aberrant Inkwell
A Coffee Shop and the Fourth Wall by Rationally Ill
Resurrection by KingSolomonHomer
Truth in Shadows by We-have-problems
Dementors and Demigods by rainbowchameleon
Of Magic and Mythology by chocolatebackground
Demigods and Hogwarts by pjhoolife
Magic, Monsters, and a Little Bit of Madness by stickysillyputty
Dark Wizard and Titan VS Demigods and Wizards by GreenOtter467
Yes, We're Half-bloods by ASmallNestOfWarmBees
Demi-Guardian's by AmethystJames
The 7 (well now 6) go to Hogwarts by awesomegirl5505
Percy Jackson & The Wizards of Hogwarts by cupcakebrit
Persassy the Professor by thaliatheawesome
The Four Most Powerful Demigods And The Three Most Powerful Wizards by ARandomFangirler
Brace Yourself, Hogwarts - The Demigods are Here by moonshroom420
Big Three to the Rescue by PercyJacksonAlways
Percy Jackson A Hogwarts teacher? by awesomegirl5505
Get Ready Hogwarts! The Demigods are Coming! by Lost-In-A-New-World
The Teachings of Godly Hogwarts by AwesomedaughterofAthena101
The Hogwarts Experience by Mickey and Minnie Mouse
The Big Three go to Hogwarts by izziemonkey
These are my fic recs for My Little Pony/Harry Potter crossovers
Dusk and Dawn by sakurademonalchemist
Six by Flitty
One Moment by Espeon Master Espo
Princess Celestia's School for Talented Unicorns by bucca2
Harry Potter: The Seventh Element by WriterPON3
The Wizard and the Lonely Princess by Harry Leferts