Quotes / New Powers as the Plot Demands

Fan works

"Hey, that's just like an anime, isn't it? I got that new power right when I needed it!"

Live-action TV

Amy: You can drive a motorbike?
Rory: I expect so. It's been that kind of day.
Doctor Who, "Let's Kill Hitler"

Web original

Superman had at least 150 powers, and the [Super Friends] writers were making up two or three more every episode. If a script called for it, Superman would leak paste out of his ears that can control the weather.

We saw this kind of thing all the time with Lana, where she became a utility character. Anytime you needed to throw a weird curveball into a season, just have Lana possessed by a witch who is her ancestor and is somehow connected to Krypton. Need to write her out of the series? Elevate her to superhero status but poison the source of her powers with Kryptonite.
Julian Finn on Smallville, "Abandoned"

But is Magneto really dead? No. Of course he isnít...'The Earthís magnetic field has healed me, as a mother nourishes her son!' and thatísÖ thatís got some really weird implications. Like, Magneto was essentially incorporeal the last time we saw him, and now heís back to normal. Is the implication here that Magneto is actually held together physically by magnetism? Is that one of those weird Silver Age things like how he used to be able to brainwash people with his 'magnetic personality?'
Chris Sims on ''X-Men, "Sanctuary, Part 2"

Web Video

Sailor Moon: Tiara! Use your lesbian trapper!
(Sailor Moon's tiara becomes larger and binds the Monster of the Week)
Luna: How the f*ck did you do that?
Sailor Moon: Hell if I know! This show makes no sense!

"Now I shall use Mega-Ultra Chicken's secret ability that I just this second made up to convert my Life Points into Attack Points, merging me with the beast itself!"

"I have placed my soul inside the Millennium Puzzle, because apparently I can do that."

"Yes, my roses allow me to do this [turn invisible] as well... I won't lie to you, I am just as surprised about it as you are."
Pisces Aphrodite, Saint Seiya Abridged

Krillin: Goku, did you just read my mind?
Goku: Yu-huh!
Krillin: But how could you-!
Goku: Muffin button.
Krillin: ...What?

Goku: By the way, I can teleport.
Krillin: ...What?
Goku: Yep! [teleports] Check it!

...Aldritch Killian, an Ex-Nerd out for revenge after Tony skipped a meeting one time, and his nameless henchmen with a confusing grab-bag of fire powers, like (sounding progressively more confused) glowing, getting hot, exploding, Super Strength, regrowing limbs, flameproof clothes, and... shooting fire off their mouth? They really made them up as they went along, huh?

Western Animation

Katara:I guess... I always knew.
Sokka: [pissed off] Oh? Well, then thanks for all the first aid over the years]].

Cartman: Hold on you guys, I actually have another power: I can see into the future too, but better than Kyle. Let me try it.
Kyle: God dammit, Cartman, you can't keep making up new powers!
Stan: Yeah dude, that's like the fifth power you've come up with!
South Park, "Good Times With Weapons"

Real Life

If you could have any super power, what would it be?
"The 'my power beats your power' power."
Johnny Yong Bosch on a Voice Actor question card.

Don't give the heroes a new power whenever they need one, and be very careful about writing laws into your system just so that you can use them in a single particular situation."

Wha—? I'm genetically-engineered? I mean, I have been all this time? I was when was six? So I'm really the Bionic Man and I've been playing this, like, loser for the last 3 years? It was one of those weird things that Tv did (does). "Ahh, today you're 'genetically engineered'."
Siddig al-Fadil on Star Trek: Deep Space Nine


http://tvtropes.org/pmwiki/pmwiki.php/Quotes/NewPowersasthePlotDemands