Rugrats: Royal Ransom

Rugrats: Royal Ransom is a platform game that got developed by Avalanche Software for THQ and initially released for the Sony PlayStation 2 on November 16, 2002, then for the Nintendo GameCube eleven days later; as the naming suggests, it is the fourteenth title in the long-running Rugrats series.

Story
This is taken from the back of the game's box, the front of which is displayed in the image to the right:

IT'S ADVENTURE TIME! Test your skills in an adventure-filled game as you ''help the Rugrats rescue their Royal Ransom! The'' Rugrats will face mysterious knights, capture rowdy monkeys, race crocodiles down twisting rivers, tame wild dinosaurs and much more on a mission to reclaim their most prized possessions! Take time to "monkey" around! Piece together the missing parts of the snowman! Blast through craters on the moon buggy! Hunt for untold treasures! Dash into a circus full of action! Dive into the depths of the ocean! 5 different Rugrats to choose from: Tommy, Chuckie, Kimi, Phil or Lil! 9 gigantic environments to conquer! Awesome 2-player action! Tons of vehicles: a moon buggy, airplane, flying carpet, snow sled and submarine! © Viacom International Inc. 2002