Oh dear, I didn't have your FC. lol I was sure I had it since we traded before....
Anyways, for the LC Sentret and Skitty, don't remove their moves and don't level them past 5. ^^
For the normal battling Skitty, you can level her up to 40-45 if you want to! Just don't evolve her and don't remove Wish and Baton pass! =)