The 2003 season was the 23rd for Paramount Canada's Wonderland.
Changes and attractions
- New attractions
- Sledge Hammer, Nickelodeon Central, Warrior Of The Dawn (Paramount Action F/X Theatre), SpongeBob SquarePants 3-D (Paramount Action F/X Theatre)
- Nickelodeon Central
- Replacing the Bedrock section of Hanna Barbera Land, Nickelodeon Central introduced new rides to the area. They were Wild Thornberrys Treetop Lookout, Jimmy Neutron’s Brainwasher, and Dora's Dune Buggies. Boulder Bumpers was retrofitted as Rugrats Toonpike.
- Live entertainment:
- Active walk-around characters: Scooby Doo. New characters are Dora the Explorer, Arnold, Jimmy Neutron, and SpongeBob SquarePants.
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