Editing Wonder Bowser Jr.

'''Wonder Bowser Jr.'''<ref>{{media link|SMBW Trading Cards.png|''Super Mario Bros. Wonder'' trading cards}}</ref> is a form of [[Bowser Jr.]] in ''[[Super Mario Bros. Wonder]]''. Bowser Jr. can obtain this form from the [[Wonder Effect|Wonder power]] in [[castle|palaces]]. Wonder Bowser Jr. is dark blue in color, with green flame-like hair and bright green spikes on his purple and orange shell. Additionally, Bowser Jr.'s bandanna is similar to a bear trap in this form, with glowing green edges on it. His color scheme is reminiscent of [[Dark Bowser]] from ''[[Mario & Luigi: Bowser's Inside Story]]''.

[[Mario]] and his friends fight Wonder Bowser Jr. four times as they journey across the [[Flower Kingdom]], with each time being different. In the [[Pipe-Rock Plateau Palace|first fight]], the size changes for Wonder Bowser Jr. and Mario and his friends. In the [[Fluff-Puff Peaks Palace|second fight]], the rising and sinking platforms change substances, such as ice and jelly. The [[Sunbaked Desert Palace|third fight]] has [[water]] that fills the screen partway, with bubbles of water bouncing around the room, and the [[Deep Magma Bog Palace|last fight]] has Wonder Bowser Jr. creating fake clones of himself, similar to [[Ludwig]] in ''[[New Super Mario Bros. U]]''.

Wonder Bowser Jr. also appears at the beginning of the final level, [[The Final Battle! Bowser's Rage Stage]], where he tries to stop Mario and his friends with Wonder power, but he ends up being accidentally hit by a [[Fire Knuckle]] in the process.

|Jap=ワンダー クッパＪｒ．

|JapR=Wondā Kuppa Junia

|JapM=Wonder Bowser Jr.