Is Elemental Hero Stratos limited?

Could you please clarify for me, is the Elemental Hero Stratos card considered to be a limited edition item in the world of collectible card games, particularly within the Yu-Gi-Oh! franchise? Are there any restrictions or limitations placed on its availability, such as being only available through special promotions, tournaments, or being part of a limited print run? Additionally, are there any notable differences between the standard version and any potential limited variants of this card?