History Main / JustWhistle

Compare CallOnMe, wherein the whistle is not included, and BlowThatHorn, for instruments which can summon forces or more general aid as well as allies.

Compare CallOnMe, wherein the whistle is not included, and BlowThatHorn, when it's a horn rather than a whistle that summons the ally.

* In the first ''WesternAnimation/{{Shrek}}'' movie, Donkey tells Dragon he'll whistle if he needs her. Shrek later calls Dragon in at a key moment by whistling, revealing that he was paying some attention to what Donkey was doing after all.

* [[Franchise/{{Batman}} The Bat-Signal]].

* For a more mundane example, the Mayor in ''WesternAnimation/ThePowerpuffGirls'' has their special phone number. He rings them up any time some horrible menace is threatening the City of Townsville. Or he needs a jar of pickles opened or something.

* In UsefulNotes/{{the Silver Age|of Comic Books}} Franchise/{{Superman}} comics, Jimmy Olsen had a special wristwatch that produced sound ("''zee-zee-zee!''") on a high-pitched frequency that only Superman could hear, summoning him to the rescue. This was revived on the Paul Dini [[WesternAnimation/SupermanTheAnimatedSeries animated series]] and ''ComicBooks/AllStarSuperman.''

* In ''WesternAnimation/{{Pinocchio}}'', Jiminy Cricket tells Pinocchio (in song) to "Give A Little Whistle" whenever he needs his help ("or if your whistle's weak, yell"). Ironically, the one time Pinocchio needs his help, Jiminy isn't there.

* ''WesternAnimation/{{Aladdin}}'': "Never fails, you get in the bath and there's a rub at the lamp." * squeaks rubber duck*

* ''Film/TheFamilyMan'' has its MagicalNegro angel/genie/whatever (played by Don Cheadle) give Jack a bike bell with no explanation when they first meet; later, when it becomes clear that the guy was some kind of supernatural being who has enacted an ''It's A Wonderful Life''-style universe-rearrangement, Jack is seen walking around ringing the bell like a lunatic, assuming it was one of these. The only effect is that his wife thinks he's insane (well, insaner), and when his daughter appropriates the bell for her actual bike (which is implied to be the actual reason the angel gave it to him, since he was also planning to rearrange the universe such that Jack would have a daughter who'd be receiving a bike on Christmas morning) Jack gets hilariously upset. "That's MINE! She took my bell!"

* Whilst out in the field, [[VideoGame/{{Pikmin}} Captain Olimar]] can summon his hordes of Pikmin by giving a little whistle. He can also perform this move in ''[[VideoGame/SuperSmashBros Super Smash Bros. Brawl]]'' to much the same effect.
* In the ''VideoGame/SuperSmashBros'' series, [[Franchise/{{Pokemon}} Pokéballs]] function similarly to the [[JustWhistle trope-verbial whistle]]; the Pokémon will briefly fight for the character that released it from its Pokéball. ''Brawl'' introduced Assist Trophies, which are a similar item that summon non-Pokémon helpers.

** In the remake starring Creator/BrendanFraser, it's a pocket calculator. He has to hit "666=".

[[folder:Film - Animated]]

[[folder:Film - Live Action]]

* ''Disney/{{Aladdin}}'': "Never fails, you get in the bath and there's a rub at the lamp." * squeaks rubber duck*

* In ''Disney/{{Pinocchio}}'', Jiminy Cricket tells Pinocchio (in song) to "Give A Little Whistle" whenever he needs his help ("or if your whistle's weak, yell"). Ironically, the one time Pinocchio needs his help, Jiminy isn't there.

* ''Series/{{Batman}}'': The direct line from Commissioner Gordon to the Batcave (and the Batsignal too, obviously).

* In "Literature/TheLittleVampire" Anna gives Tony a good luck charm (dead mouse), and tells him to whistle if he ever needs her help. He later does so when Rookery shuts him in a coffin, and Anna, as promised, shows up to let him out.