Here's how Darkrai's sacrifice goes in Little Bear's Adventures of Pokémon: The Rise of Darkrai.
[Alice feels something behind her, and turns around and gasps. Darkrai springs up into action and flies directly towards Dialga and Palkia]
Emily: It's Darkrai!
Dialga: ROAR!!! [builds up Roar of Time]
Palkia: ROAR!!! [builds up Special Rend]
Darkrai: STOP!!! [he makes protective sphere]
[When Dialga and Palkia fired their attacks, Darkrai blocks it with the sphere he made and it engulfs Dialga and Palkia, and some various objects disappear. Ash, Dawn, Little Bear, Duck, and the other Pokémon look up to the scenes, and it zooms into Darkrai]
Darkrai: This garden is EVERYONE'S!!
Duck: He's buying us some time!
Dawn: The disk! Let's hurry!
Little Bear: Come on, we're almost to the top!
[They continue racing to the top]
Tonio: Darkrai's blocking the explosion's energy, but for how long?
Hen: I've got a bad feeling about this.
Cat: Come on, Darkrai! You can do it!
[The others look up to Darkrai, and he is starting to get weak. And it cuts back to Ash, Dawn, Little Bear, Duck, and the other Pokémon racing to the top]
Duck: Run faster, guys!
[Buneary quickly used an Ice Beam to stop a disappearing. But then explosion tidal waves that Darkrai's holding appear, and it makes part of the tower disappear and Ash almost falls, but Dawn grabs his hand, Piplup grabs her boot, and Little Bear grabs onto Dawn but then a metal pole Ash is holding disappears, and the four of them fall! But Buizel uses Water Gun to shoot them up into the high ground]
Little Bear: We're okay!
Ash: Buizel, thanks a lot!
[Buizel responds back]
Ash: Hey Pikachu, take care of everyone!
Little Bear: And Duck, stay with Pikachu and the others!
Duck: You got it, Little Bear!
[Duck and the rest of the Pokémon start racing up, while Ash, Dawn, Piplup, and Little Bear start making there way up. But as they do so, Darkrai starts getting weaker, and the bubble he made shrinking and Dialga and Palkia are freed. But Dawn notices this]
Dawn: Huh? Ash, Little Bear, come back!
[Ash and Little Bear came to the scene and they gasp]
[Down below, everyone watches in worried. But then Dialga and Palkia fired some of their attack on Darkrai and exploded! Which made everyone gasped in horror, then Darkrai floats up from the steam and he begins disappearing]
Alice: Darkrai, no!
Owl: He's disappearing.
[Darkrai keeps on disappearing]
Dawn: But how?
[Now, Darkrai is completely gone. And Duck and the Pokémon had watched what happen to him as well]
Duck: He's gone.
[Down below, everyone looks in horror]
Owl: (as Woody) [gasping] No! No, no, no! No! Nooooooooooo, no, no, no, no, no, no! NO!
Cat: (as Squidward) Oh, why must every 11 minutes of my life be filled with misery? Why-y-y-y?!
[A tear streams down on Alice's face]