Season pork with Adobo. Place pork and pigs’ feet in large pot; cover with cold water (about 16 cups). Bring water to a boil over medium-high heat; skim off any foam that rises to the surface. Add cilantro and Sazón. Lower heat to medium-low and simmer, uncovered, 1 hour. Season chicken with Adobo. Add chicken to pot; bring water to a boil, skimming foam. Lower heat to medium-low and simmer, covered, until chicken is cooked through and pork is tender, about 30 minutes more.
Meanwhile, in a small saucepan, bring guajillo chiles and 4 cups water to a boil. Lower heat to medium-low and simmer until chiles begin to soften, about 5 minutes. Remove pot from heat and let sit until chiles are soft, about 20 minutes.
Tear chiles into pieces. Transfer chiles, chile-soaking liquid, onions, garlic and allspice to a blender; puree until smooth. Strain chile mixture through medium-mesh strainer, discard debris; set aside.
Using tongs, transfer pork and chicken to bowl; discard cilantro. When meat is cool enough to handle, shred into small pieces. Discard skin, bones and cartilage. Transfer meat back to broth; stir in hominy and guajillo sauce. Bring stew to a boil; lower heat to medium-low and simmer, uncovered, until flavors come together, 5–10 minutes more. Season with Adobo.
Serve Pozole in large, deep bowls with toppings on the side.