We find out that the earlier XJ models can combined with each other to make weapons. Also, while under the Clusters control, Jenny can absorb her sisters to make a weapon out of each of them.
When we first see Jenny opening her locker, you can hear her humming the theme song.
XJ1's crying shouldn't have put out the flame since oil is highly flammable. If anything it should have made the fire way bigger!
Jenny: (to Brad and Tuck) Do you realize I just beat you in Soccer and fuse ball?
Nora Wakeman: Did I say "impossible"? I meant "improbable," by which I mean... They have done it! They have taken over XJ9!
Smytus: We have taken over XJ9!
Nora Wakeman: Isn't that what I just said?
Mrs. Wakeman: (trying to cover for Jenny, while fishing in a drained lake) They're just not biting tonight. (nervous chuckle)
Jenny: You don't think I'm a freak, right, mom?
Mrs. Wakeman: No, I don't...I just think you're grounded for two weeks!
Skyway Patrol guy: (mocking the others, in the pouring rain) It's a beautiful night! Let's take the convertible!
Mrs. Wakeman: My XJ-9 is no danger to anyone! (Jenny barges in and slams the door on Mrs. Wakeman)
Jantrice: I'll give you a makeover!
Jenny: And then I'll give you one! (deploys a bunch of dangerous-looking metal tools)
Mrs. Wakeman: (comforting XJ-1) There, there, it's all right. Somewhere ... just not here.
Aired during U-Pick Live, around 6:10 PM ET/PT, as part of MLaaTR's "Fantastic Week of Firsts."
Episode Title: Sister Sledgehammer
This is a reference to the music group Sister Sledge.