Senerio one:

- Cop Cross
- Mafia Nightmare

You can make up your own plot for this one.

Scenario two:
Cross decides to leave Nightmare alone, thinking that it'd be better that way. Nightmare realizes he actually really liked the attention, and goes out to find him. Only to see him sitting on the rim of a bridge.

Scenario three:

One of them becomes a bitty. No more than four inches high.

Scenario four:
Custom!