If You complete the indicated number of objectives You'll unlock the corresponding bonus:
Race Track 1 mini-game - 25 objectives
Race Track 2 mini-game - 60 objectives
Range Driver 1 mini-game - 10 objectives
Range Driver 2 mini-game - 40 objectives
Finishing Moves attack - 20 objectives
Ground Pound attack - 50 objectives
Bumper Carts 1 mini-game - 15 objectives
Bumper Carts 2 mini-game - 45 objectives
DreamWorks game references
After completing "Projector Heist", go by the tree stump in the woods. The two possums will be watching Shrek Super Slam on the film projector. The projector and laptop show different DreamWorks video game screens. The laptop always shows Shrek Super Slam. The projector is different, however. From when you first get the projector until about half way through, Shrek Super Slam is on the screen. From about halfway through the game until just before you play the final level, it plays Shark Tale. After you play the last level it will show Madagascar. However, even though they show the video games the animals sitting next to the projector will talk as if they were watching the actual movie.
"Caught In The Hedge": Easy full health objective
When You're on level 4, "Caught In The Hedge", there is a beat the level with full health objective. To accomplish this, switch to the CPU at the very end of the level. They will have taken no damage and have full health.