If I can shoot you in the right direction I would live to help.
Look for FW: Fruity Flakes. This is like bottom of the bag fruity pebbles. This plus Bavarian Cream FW will get you close. Then tweak to your liking. Add fruit loops if you want too for a different flavor.
Just the cereal part:
FW Fruity Flakes 3%
TFA Lucky Leprechaun 2%
Add a cream base to this for a game over clone:
FW Bavarian Cream .5%
FW Vanilla Custard .5%
FW Milk .5%
FW Vanilla Bean Ice Cream .5%
That should give you guys a real good cereal to try.