TCG Rulings

• Removing this card from play is a cost.^[1]

OCG Rulings

• The effect of "A/D Changer" is an Ignition Effect that you can only activate during your Main Phase.^[2]

• Removing from play "A/D Changer" is an activation cost for its battle position-changing effect.^[2]

References

1. ↑ Konami Gameplay FAQ: Duelist Revolution Sneak Peek -- Card Rulings (Version 1.1)
2. ↑ ^{2.0 2.1} Konami FAQ: Effect Monster > A/D Changer