LEGO Ninjago: Dream Team.

When the Ninja find a young boy, Jan, under attack by strange shadow creatures, they leap into action. But their fighting skills prove useless against their new enemies' powers and Jan is captured. Just as hope begins to fade, the dream chasers arrive to help. Together, they turn the tide, only to discover they're actually in Jan's dream. Now, united with the dream chasers, the Ninja must free Jan and the dream world from the sinister Nightmare King.