Here's Nick's look in the different canons

On the left is his normal look. Nick is more of the athletic of the three. He works out at the local gym and sometimes goes on long runs. He lives with his boyfriend Eddie and roommate Tobias

On the Right is the pokeverse look. Nick is a retired surfer who lives in Vermilion city. Nick was in a financial bind and took out a loan from a loan shark who worked for Rocket Corp. Eddie was able to find him before some of the grunts were ready to beat him. To repay his debt, Nick helps Eddie on his trail to tag the Rocket Corp.