South Park: The Fractured but Whole

There are a total of 4 different summons in the game that you must find and acquire. Most of them require you to do something prior to unlocking them. Here is a list of all 4 of the summons and how to unlock them:

• Moses - Head to the church and talk to Father Maxi. He will tell you to enter a dark room to face your fears, but instead you will have to face to paedophile priests. After you defeat them, Father Maxi will return and apologize for them and give you the ability to summon Moses by giving you macaroni art to summon him (and supplies to craft more).
   
• Cheesing Gerald - You must first unlock the Fartkour friendship ability & also find a cheesing vile. Once you have both, make your way over to Kenny's house and look for the pinwheel by the far left building. Use your Fartkour ability to make it to the top of there, then head right and use it again to get over where Gerald is sitting on top of the building. Talk to him twice, with the second time giving him the cheesing vile and he will give it back and tell you that he will help you whenever you need, unlocking his summon.
   
• Ned & Jimbo - Anytime after night 1, head to Jimbo & Ned's gun shop and talk to Jimbo. He will tell you that he left his wallet at the Peppermint Hippo and asks you to retrieve it for him. Head back the Peppermint Hippo and to the table where Jimbo & Ned were sitting (to the left of the stage) to find his wallet. Return it to him and he unlock their summon and give you the CB radio to use to summon them.
   
• Classi - This one is story related. On day 4 before you enter Token's house, Classi will call you to thank you for your help and tell you that if you ever need her to give her a call, thus unlocking her summon. She will also give you burner phones to use to summon her at the same time.

Once you have unlocked all 4 of the summons, the trophy will unlock.