Antipaladin Fiendish Boon: XP to kill?

[Tandriniel]

If I throw an Antipaladin at my party, and this antipaladin has a creature with him from the Fiendish Boon class abillity, does killing this creature give XP?

[Brf]

Generally, companions which are part of a class's abilities, are included in the base creature's CR.

[Serisan]

The general rule, as Brf said, is that the creature should not provide XP for killing it. That said, if the party kills the Fiendish Boon critter and the Antipaladin runs away, they get full experience for defeating the Antipaladin encounter.

[Tandriniel]

Thanks.