Name
Roll 1d12 twice
First Roll Second Roll
1 Special Wheat
2 Frosted Meal
3 Oat Flakes
4 Fruity Charms
5 Mini Crunch
6 Honey Crisps
7 Apple Bran
8 Corn Jacks
9 Raisin Pebbles
10 Shredded Loops
11 Lucky Oats
12 Rice Charms

Health
Roll 1d6
1-2 Healthy
3-4 Unhealthy, but pretends to be healthy
5-6 Unhealthy

"Health" "Benefits"
Even if the cereal is unhealthy they'll advertise some health benefit.
Roll 1d6
1 Vitamin C fortified
2 Good source of vitamin D (when eaten with milk)
3 Electrolytes
4 Excellent source of fiber
5 Will make your heart healthy
6 Has literally every vitamin and mineral you need.

Target Demographic
Roll 1d6
1 For kids
2 For adults
3 For kids that act like adults
4 For adults that act like kids
5 For those with an active lifestyle
6 For the whole family

Mascot
Roll 1d6
1 No mascot
2 Real life person/people
3 Character from a TV show (roll 1d6, if a 1 it's from a live action TV show, else it's from a cartoon)
4 Racist caricature
5 Used to be a racist caricature but was changed (roll again to see what it was changed to)
6 Anthropomorphic animal
7 Anthropomorphic animal, but furries don't want to have sex with it.

Prize
Roll 1d6, +5 if the target demographic is adults
1 Mask you cut out from the back of the box
2 Temporary Tattoo
3 Whistle
4 Toy car
5 Action figure (roll 1d6, if 1 it's articulated)
6 "Go online for your chance to win..."
7+ No prize

Advertising
Roll 1d6 three times. First is how the commercial opens, second is the middle, third is how it ends
1 Catchy Jingle
2 Feel Good message
3 Feel Bad message
4 "It's basically legal steroids"
5 "Part of any nutritious breakfast"
6 "Side effects may include..."

Market Share
Roll 2d6
2 0.5%
3 1%
4 3%
5 5%
6 10%
7 15%
8 30%
9 40%
10 50%
11 70%
12 90%