Like every single chapter apart of Detective Pikachu, you will be able to activate a variety of different Pika Prompts during the first chapter of the game. Some of these Pika Prompts have certain location requirements found in this chapter, while some you can activate by doing nothing special at all. In total, you can obtain 12 Different Pika Prompts during the first chapter of the game. Below is a list of all said Pika Prompts, along with the requirements for each.
Pika Prompts (Ryme City): No Special Requirement
A Trace Of The Culprit (Ryme City): No Special Requirement
A Trace Of Aipom (Ryme City): No Special Requirement
The Ketchup Stains (Ryme City): Be Near Ketchup Aipom Tail Print
Imagine You're The Victim (Tahnti Park): Be Near Attacked Aipom
Who's The Owner Of The Black Feather (Tahnti Park): Obtain Black Feather
The Soccer Ball (Tahnti Park): Be Near Scraggy & Its Trainer
We Can Always Talk (Tahnti Park): No Special Requirement
Inside The Trash Can (Tahnti Park): Be Near The Garbage Can In The Eastern Side Of The Park
A Coffee Sale (Tahnti Park): Be Near Park Cafe
Aipom's Mischief (Tahnti Park): Be Near Aipom
A Fletchling Hat (Baker Detective Agency): Be Near Fletchling & Amanda