Edison format ruling
Desertapir

Card effect (current official text)FLIP: Flip 1 face-up monster on the field into face-down Defense Position. You cannot select "Desertapir".
Rulings
- You cannot select any Desertapir with Desertapir's effect.
- If you have Destruction Punch and Desertapir is attacked by a monster with ATK lower than Desertapir's effect, and Desertapir's effect flips the attacking monster face-down, the effect of Destruction Punch is applied and the attacking monster is destroyed.
- If Mystical Knight of Jackal or Ghost Knight of Jackal attacks, and is flipped face-down by Desertapir, the attacking monster is no longer face-up when Desertapir is sent to the GY (which is when their effects activate), so their effects do not apply to Desertapir.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.