Bowser (voiced by the Kenny James) is known as the the Koopa King, and is the chief rival of Mario and Luigi. He is also an enemy to Pooh, and Ash in Pooh's Adventures. His wife is Mistress 9, and his son is Bowser Jr.
- It is currently unknown if Jaden will ever meet Bowser.
- Bowser will become Jeffrey's enemy in Jeffrey, Pooh & Friends' Storm Adventures of Wild Wild West.
- Bowser will appear in Jesse, Xion, and Luigi's Mansion.
- Jaden and Jeffrey will face Bowser again in Jeffrey, Jaden & Friends' Storm Adventures of Super Mario Sunshine.
- Jaden and Jeffrey will face Bowser again in Jeffrey, Jaden & Friends' Storm Adventures of Super Mario Galaxy.
- Bowser becomes Juniper Lee's enemy in the eighth episode of the Juniper Lee's Adventures Series titled Super Smash Sister. he is one of the many video game villains who help rebuild Metal Sonic
- Bowser may face Aaron, & Arik in the future.
- Bowser will appear again in Jeffrey, Jaden, Hiccup & Friends' Storm Adventures of Super Mario Odyssey.