Combo Meal Achievement
Transform a Grumpus with Bunger, Fryder, and Sodie.Bungers, Fryders and Sodie are all found inside Garden Grove.
For a Bunger, you need to either knock it out with another Bunger by putting ketchup on them or use the trip wire.
For Fryder, you need to put down your snack trap in their cave and put ketchup on it.
For a Sodie, just put your snacktrap in the path of the Dr. Sodie and catch it.
Go back to Snaxburg and feed all three to a Grumpus to unlock the achievement.