Like many other "Frog" monsters, this card's Japanese name is a pun. This card's name is a pun of 差し替える (Sashikaeru) or "replace".
This card seems to be a watered-down version of the banned "Frog" support card, "Substitoad".
Additionally, this card's name may be a reference to this fact; it's a "replacement" for "Substitoad"
By looking at this card's artwork, it appears to be a younger version of "Substitoad". Strangely though, it has the same ATK and DEF as "Substitoad".
Also, the skin colors of this card are flipped along with the placing of the angel and fiend wing. It also has an arrow on its back instead of the gear-like marking on "Substitoad's" pink side.
This is fitting because "Tradetoad's" effect summons from the grave while "Substitoad's" summons from the deck.
This is the third Toad monster. The others are "Substitoad" and "Ronintoadin". Despite its name, "Toad Master" does not count as a Toad monster because of its Japanese name, which uses the word "todo" instead of "kaeru".