As a little help, PCC2 knows special friendly codes and offers you them on a list. Note that the list also contains a friendly code ???, which is not special to host. However, the simulator treats it as an exception to the "same fcode, no fight" rule, so you don't have to come up with individual fcodes for completely made-up fights.

  • Tab: Switch between input and list
  • AltR: Pick a random friendly code that has no special meaning

Reference

Keys:
F from control screens and battle simulator