Adrien and his older brother Felix are trying to fix the broken pieces of their family after their parents die. Felix and Adrien decide to adopt a pet, a cat which they name Plagg. What they didn't realize was that Plagg is actually a space alien convict, with a scientist, a scientist, and a military General after their new pet.
Whose Who:
Lilo - Adrien
Stitch - Plagg
Nani - Felix
David - Bridgette
Jumba - Wayazz
Pleakly - Nooroo
Cobra Bubbles - Nathalie/Officer Roger
Gantu - Hawkmoth
Grand Council Woman - Duusu/ Master Fu
Mertle - Chloe
Extra incase you want to follow the TV series
Angel - Tikki
Marinette would be Bridgette's cousin who is just around Adrien's age and joins in hunting for experiments/akumas.