From what we know, Gwen and Charmcatster's energy blasts are a little similar to the characteristics of the Omnitrix, because their spells represent the user's clothing color. Gwen wears blue mostly, so the blasts are blue. Charmcaster wear purple-colored clothes, so her blasts are purple.
When Charmcaster makes her "spelling contest" comment, closed caption shows that Gwen said it.
Credits Tidbit: Vilgax and Kevin 11 are listed in the credits, despite not appearing.
Look Closely: When Cooper's on his doorstep, the 3 on his jersey disappears.
Ben: Who's hungry? Because I've got a couple of knuckle sandwiches right here! (Grandpa Max shoots off incoming aliens; Ben sighs) Thank you, Grandpa.
Ben: Remember the hologram you made of us in the Rustbucket?
Grandpa Max: Yes.
Ben: Well, how good are you at making presidents? Big presidents?
Upchuck: (makes fun of the Forever Knight ninja) Now who is seeing stars?
Forever King: You have been a thorn on my side long enough, Ben Tennyson!
Forever King: Now I shall be the Forever King of the world!
Eye Guy: (makes fun of Clancy) Insect on ice. Now that's cold!
Charmcaster: (yells at Gwen) You can't beat me, princess!
Grandpa Max: Gwen, a little help here. Needs a push.
Grandpa Max: (has Animo in a headlock) Better call off your overgrown prairie dog, or you'll be the one who needs a doctor!
Charmcaster: (to Gwen) Ready for a little spelling contest?
Four Arms: (to the Negative Ten) Come on, I could whup you all with three arms tied behind my back!
Forever King: There is no place left to run, Tennysons!
Eye Guy: Who's running, metal mouth? Bring it on!
Cooper: (hypnotized) Must obey, attack Tennysons!
It seems Four Arms has gained more strength because he can make shockwaves with only one fist instead of two.
Clancy is once again frozen the second time in the series.
Gwen can hover using her magic.
This is the final appearances of Four Arms, Wildmutt, Upchuck, Eye Guy, and Heat Blast. Although Four Arms, Heat Blast, and Wildmutt were mentioned in the next episode.
Mount Rushmore is destroyed in this episode when Upchuck blows it up.
This is the first time Eye Guy is seen outside of Ben 10: Secret of the Omnitrix (Alternate Alien Version). However, how he received the alien is still unknown.
The Forever King is the ex-Plumber called Driscoll. He betrayed the Plumbers and got kicked out, and he eventually joined the Forever Knights and became their leader. This could possibly explain how Enoch knew about them in "Ultimate Weapon", when he didn't recognize them in "A Small Problem."
Alien Form(s) used:
1) Four Arms
2) Heat Blast
4) Eye Guy
Cooper's power is to technopathy, the ability to "talk" to machines.
The visors used to help the Tennysons and Cooper are like blue versions of Cyclops's visors from X-Men.
The weapon the Forever Knight Ninja uses is familiar to the double-ended lightsaber used on Star Wars by Darth Maul, but is yellow.
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