I have compiled some possible systems. If you have any you would like to add to the list, please say so, and tell me why they are awesome.
Storytelling System (NWoD)
Pros
- Simple and easy.
- Very well-crafted core mechanic that helps to tell stories.
- Character creation could lend itself well to the game's concept.
- The concept feels like something from the World of Darkness, and could perhaps be loosely worked in.
Cons
- Would be harder to adapt, since there is no generic system book.
- Would need to be adjusted to work with animate stuffed bears.
Savage Worlds
Pros
- Dynamic, relatively easy rules.
- Generic system book would help to make the process easy.
- Flexible character creation.
Cons
- The core stats may need to be adjusted.
- Use of the system would mean that the game would almost require miniatures.
Adjusted d20 System
Pros
- Widely known.
- System is open.
Cons
- The rules can be rather clunky.
- Feels bloated.