Hypothetical scenario: Opposing Pokémon moves first and faints due to self-sacrificing move/recoil/life orb/abilities. Normally any attack that your Pokémon try to use would fail due to lack of a target. What moves, when used in this scenario, would still work?
In addition to that,
The logic here is that if it affects the field or allies as opposed to a singular target, it should still activate.
Note: Not sure about Memento and Final Gambit
The above is based on logic as opposed to individual testing, meaning there might be a specific case where it doesn't apply. Should such an instance be found, let me know and I'll edit that in.