What is the Swap Frog in Yu-Gi-Oh!?

Swap Frog is a level two Aqua effect monster with 1,000 attack and 500 defense points in the Yu-Gi-Oh! trading card game. The effect of Swap Frog allows the controller of the card to summon more powerful Swap Frog monsters by returning one monster card to the player's hand.

Swap Frog is part of the frog archetype in Yu-Gi-Oh! cards, a set that starts with weaker, low-attack cards that quickly multiply and increase their effectiveness. Players can summon multiple monsters on a single turn, and spell cards enhance the effects of frog monster cards. Princess Rose of the anime series Yu-Gi-Oh! GX utilizes this archetype based on the fairytale of "The Frog Prince."