Bowser

 Bowser , sometimes known as King Koopa (Japanese: "だいまおう">大魔王) Daimaō Kuppa, which translates into "Great Demon King Koopa" or "Great Sorcerer King Koopa", the latter being used in the manual of Super Mario Bros. Due to the various possible meanings of maō, on page 14 of the North American manual for Super Mario Bros., the character is referred to as "the sorcerer king" in addition to "King of the Koopa".), is a major character and the main antagonist of the Mario (franchise) Mario franchise. He is a large, powerful, fire-breathing Koopa who leads the Koopa Troop, an antagonistic organization of turtle-like creatures, and has been the archenemy of Mario since his debut in Super Mario Bros. He has repeatedly kidnapped or attempted to kidnap Princess Peach with the ultimate goal of defeating Mario and taking over the Mushroom Kingdom.

Bowser Jr.
Bowser Jr. is Bowser's son like the Koopalings Bowser Jr. loves to play with trains no matter how Bowser Jr. helps his dad kidnap Peach & tries to kill Mario but Bowser keeps on failing things when Bowser Jr. Disguise himself as mario made of water called Shadow Mario to kidnap Peach In Delfino Plaza but Mario spray Bowser Jr. with water.