Disclaimer: I am not George Lucas or J.K. Rowling.
Here are the characters in this story:
Harry Potter - Luke Skywalker (age 11), first year
Ron Weasley - Han Solo (age 11), first year
Hermione Granger - Leia Organa (age 12), first year
Ginny Weasley - Mara (Jade) Solo (age 10), sister to Han Solo
Fred Weasley - (Ton) Phanan Solo (age 13), third year
George Weasley - Face (Loran) Solo (age 13), third year
Percy Weasley - Jacen Solo (age 15), fifth year
Molly Prewett Weasley - Jaina Solo (age 45), mother to Han Solo
Draco Malfoy - Galen Marek (age 11), first year
Vincent Crabbe - Cornelius Evazan (age 11), first year
Gregory Goyle - Ponda Baba (age 11), first year
Albus Dumbledore - Yoda (age 110), Grand Master
Minerva McGonagall - Mon Mothma (age 70), Master of Jedi Sorcery
Filius Flitwick - Sio Bibble (age 70), Master of the Force
Severus Snape - Darth Vader (age 31), Master of Potions
James Potter - Anakin Skywalker (deceased), member of the Jedi Order
Lily Evans Potter - Padmé Amidala Skywalker (deceased), member of the Jedi Order
Quirinus Quirrell - Firmus Piett (age 24), Master of Defense Against the Dark Side of the Force
Lord Voldemort / Tom Riddle - Lord Sidious / Cosinga Palpatine (age 65), Dark Lord of the Sith
Rubeus Hagrid - Chewbacca (age 62), gamekeeper
Argus Filch - Jurokk (age 55), caretaker
Hedwig - R2-D2 (age 11), astrodroid
Oliver Wood - Tycho Celchu (age 15), fifth year
Angelina Johnson - Dia Passik (age 13), third year
Alicia Spinnet - Shalla Nelprin (age 13), third year
Katie Bell - Tahiri Veila (age 12), second year
Rolana Hooch - Garven Dreis (age 57), coach
Vernon Dursley - Owen Lars (age 42), uncle to Luke Skywalker
Petunia Dursley - Beru Lars (age 42), aunt to Luke Skywalker
Dudley Dursley - Laze (Loneozner) Lars (age 11), cousin to Luke Skywalker
Marcus Flint - Moradmin Bast (age 16), sixth year
Tom - Wuher (age 45), bartender
Lee Jordan - Wes Janson (age 13), third year
Pansy Parkinson - Vestara Khai (age 11), first year
Augusta Longbottom - Syal Antilles (age 67), grandfather to Wedge Antilles
Neville Longbottom - Wedge Antilles (age 11), first year
Seamus Finnagan - Nien Nunb (age 11), first year
Dean Thomas - Lando Calrissian (age 11), first year
Poppy Pomfrey - Vokara Che (age 45), nurse
Parvati Patil - Winter Retrac (age 11), first year
Godric Gryffindor - Revan (deceased), founder
Salazar Slytherin - Exar Kun (deceased), founder
Rowena Ravenclaw - Bastila Shan (deceased), founder
Helga Hufflepuff - Meetra Surik (deceased), founder
Cuthbert Binns - Vodo Siosk-Baas (deceased), Master of Galactic History
Nicholas de Mimsy Porpington - Canderous Ordo (deceased), spirit of House Revan
Bloody Baron - Jace Malcom (deceased), spirit of House Kun
Fat Friar - Mission Vao (deceased), spirit of House Surik
Helena Ravenclaw - Satele Shan (deceased), spirit of House Shan
Peeves - Bogan (amortal), Force entity
Firenze - Thrawn (age 20), Chiss
Bane - Thrass (age 45), Chiss
Ronan - Stent (age 23), Chiss
Sirius Black - Obi-Wan Kenobi (age 32), prisoner of Kessel
Fang - Drang (age unknown), vornskr
Griphook - San Hill (age 42), banker
Norberta - Lumpy (newborn), acklay
Giant Squid - Colo Claw Fish
Fluffy - Lowie (age unknown), reek
Cornelius Fudge - Cal Omas (age 45), Chief of State
Scabbers (Peter Pettigrew) - Nute Gunray (age 32), Sith disguised as womp rat (Viceroy)
Arthur Weasley - Jonash Solo (age 45), father to Han Solo
Lucius Malfoy - Dooku Marek (age 39)
Hermes - SD-XX (age 15), hunter droid
Ollivander - Ko Sai (age 67), Chief Wandmaker
Irma Pince - Jocasta Nu (age 80), archivist
Aurora Sinistra - Tionne Solusar (age 41), Master of Astronomy
Padma Patil - Sheltay Retrac (age 11), first year
Lavender Brown - Bria Tharen (age 11), first year
Ernie McMillan - Corran Horn (age 11), first year
Hannah Abbot - Iella Wessiri (age 11), first year
Susan Bones - Mirax Terrik (age 11), first year
Pomona Sprout - Yaddle (age 68), Master of the Living Force
Devil's Snare - Sarlacc (age unknown), carnivorous plant
Dedalus Diggle - Elegos A'Kla (age 39), member of the Jedi Order
Doris Crockford - Astri Oddo Divinian (age 45), Force user
Mafalda Goshawk - Wolam Tser (age 50), author (mention only)
Bathilda Bagshot - Mander Zuma (age 88), author (mention only)
Adalbert Waffling - Arhul Hextrophon (deceased), author (mention only)
Newton "Newt" Scamander - Voren Na'al (deceased), author (mention only)
Emeric Switch - Vicendi (age 88), author (mention only)
Phyllida Spore - Ebenn Q3 Baobab (age 63), author (mention only)
Arsenius Jigger - Talzin (deceased), author (mention only)
Quentin Trimble - Hego Damask (deceased), author (mention only)
Nicolas Flamel - Zonama Sekot (666), alchemist
Perenelle Flamel - Jabitha Hal (658), wife to Zonama Sekot
Locations:
Hogwarts School - Jedi Temple
Gringotts Bank - Muunilinst
Leaky Cauldron - Chalmun's Cantina
Diagon Alley - Mos Eisley
Ollivander's - Kamino
Flourish and Blotts - Obroa-skai
Forbidden Forest - Unknown Regions
Surrey - Tatooine
Number 4, Privet Drive - Lars Homestead
Godric's Hollow - Mos Espa
Platform 9 3/4 - Docking Bay 94
KIng's Cross Station - Mos Eisley Spaceport
Quidditch Pitch - Podrace Field
Madam Malkin's - Shmi Skywalker's
Florish and Blotts - Nu and Tahl's
London - Coruscant
Hogsmeade Station - Docking Bay 327
Hogwarts Express - Jedi Cruiser
Railview Inn - Nar Shaddaa
Hut-on-the-Rock - Raxus Prime
Species:
Human - Human
Goblin - Muun
Centaur - Chiss
Half-Giant - Wookiee
Muggle - Mundane Beings
Wizard - Force user
Unicorn - Ronto
Boarhound - Vornskr
Owl - Astromech droid
Three-Headed Dog - Reek
Norwegian Ridgeback - Acklay
Troll - Gamorrean
Ghost - Force spirit
Poltergeist - Force entity
Organization
Gryffindor - Revan
Slytherin - Kun
Ravenclaw - Shan
Hufflepuff - Surik
Death Eater - Sith Order
Order of the Phoenix - Jedi Order
Ministry of Magic - Galactic Republic
Other:
Wizard's Chess - Dejarik
Quidditch - Smashball
Bludgers - Dovin Basals
Quaffle - Grav-ball
Golden Snitch - Golden Globe