Respect Bowser Jr and his Magic Paintbrush !
Boswer Jr is the latest in the long-line of Koopa kids, unlike his siblings he seems to be the physically weakest, and lacks the mental brilliance of certain other siblings, however he is ever tenacious and brash. Willing to give it his all to get nastiness done.
However, any deficiency's he has, he can make up with his 'Magic Brush' an incredibly potent weapon created by Professor E. Gadd.
With the Brush Junior can......
[list]
[*]Generate toxic and/or poisonous 'slime'
[*]Shape-shift his whole body and individual parts of his body
[*]Defy gravity
[*]Create Sentient life which can actually spread more 'goop'
[*]Create tangible 'graffiti' which can be used as a teleportation/warping device
[*]Create Sub-dimensions entirely to his liking
[*]Control everything within said sub dimension
[*]General usage as a combat weapon
[*]Emulate others physical traits
[*]Create 'storage' dimensions
[/list]
He's also pretty smart (at least compared to Mario, Princess Peach and his Father) and has a good knowledge of technology, able ot work the Mecha-bowser and a Submarine. His koopa physiology also seems to render him immune to high temperatures and Toxic slime.