Packet Swap is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Packet Swap is Unlimited.
YGOPRODeck lists Packet Swap for these formats: Common Charity, TCG, OCG, Master Duel.
A listed print of Packet Swap appears in Dark Neostorm (DANE-EN067) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Packet Swap is about $0.05 on Cardmarket (prices change frequently).
