Make Shape-N-Amaze 3-D character three days in advance. Use online directions to create bear cake topper.
Cover cake base in fondant. Tint 14 oz. fondant violet. Use 20 in. fondant roller with orange guide rings to roll out 1/8 in. thick. Cover cake base in fondant.
Make cake. Prepare batter following recipe directions. Bake and cool 1-layer cake according to pan package directions. Place on cake base.
Cover cake with fondant. Prepare buttercream icing following recipe directions. Use spatula and icing to lightly ice cake. Use fondant roller with orange guide rings to roll out white fondant 1/8 in. thick. Cover cake with fondant.
Decorate cake. Tint 1 oz. fondant each four shades of yellow: light lemon yellow, darker lemon yellow, golden yellow and golden yellow/orange combination. Tint 1 oz. each four shades of green: kelly green, leaf green, light leaf green/lemon yellow combination and darker leaf green/lemon yellow combination.
Use 9 in. fondant roller with pink guide rings to roll out each color 1/16 in. thick. Use smallest round Cut-Out to cut 27 small rounds of each color. Use damp brush to attach five high and 42 around randomly to sides of cake.