After playing a Undertale and @leonknighte 's Luca’s Tale,
I wanted to figure out how to reflect my character across different surfaces, like a mirror and water reflections.
After tinkering around and getting down how the UnderTale movement works, I have both a mirror and a water reflection.
With the water reflection, you can’t really use the reflection behavior because using 2 behaviors (for the X and Y) and imputing back on just one of them will stop all reflections. In this example, I actually hand sprite the character upside down so I could just use the X reflect. I actually think using NO reflection behaviors with the controls would be best and to just animate Left and Right individually because of the work around to activate the back input is not perfect.
Reflection behavior is better used as to how the player/reflections looks rather than being tied to the movement or spriting upside down.
Reflection Example: