ok so i found a secret 3rd ending in the main campaign that no ones talking about and i wanna share it with Tattletail enthusiasts like myself so heres what youre gonna wanna do to get it

Step 1: Select a Night To Remember
Step 2: turn on the dev commands (press =-`and tab at the same time and then press tab again)
Step 3: do the ye ol Tattletail thingy feed him brush him and wrap him back up
Step 4: go back upstairs and then walk outside
Step 5: type Tattletail true in the dev console (you can also type in flashlight true)
Step 6: get on top of the doghouse and then jump on the house
Step 7: walk to the basement entrance outside and get on the invisible wall above the metal fence
Step 8: walk across the invisble wall till you get to the hill area
Step 9: just walk off the hill area and fall and wait for the magic to happen
and also, tattletail will say some of his secret voicelines and hell be super mad at you so uhh